diff --git a/pjlib-util/src/pjlib-util-test/resolver_test.c b/pjlib-util/src/pjlib-util-test/resolver_test.c
index 2d23906ea1..ff346b8b67 100644
--- a/pjlib-util/src/pjlib-util-test/resolver_test.c
+++ b/pjlib-util/src/pjlib-util-test/resolver_test.c
@@ -1018,7 +1018,7 @@ static int simple_test(void)
                     NULL, return -300);
 
     pj_sem_wait(sem);
-    pj_thread_sleep(set.qretr_delay * 1.2);
+    pj_thread_sleep((unsigned)(set.qretr_delay * 1.2));
 
 
     /* Both servers must get packet */
diff --git a/pjlib-util/src/pjlib-util-test/test.c b/pjlib-util/src/pjlib-util-test/test.c
index cc519c949e..ee8609e9df 100644
--- a/pjlib-util/src/pjlib-util-test/test.c
+++ b/pjlib-util/src/pjlib-util-test/test.c
@@ -24,8 +24,10 @@
 
 pj_pool_factory *mem;
 struct test_app_t test_app = {
-    .param_log_decor = PJ_LOG_HAS_NEWLINE | PJ_LOG_HAS_TIME |
-                       PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_INDENT,
+    {0},            /* ut_app */
+    PJ_LOG_HAS_NEWLINE | PJ_LOG_HAS_TIME |
+        PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_INDENT,
+                    /* param_log_decor */
 };
 
 void app_perror(const char *msg, pj_status_t rc)
diff --git a/pjlib/src/pj/ioqueue_winnt.c b/pjlib/src/pj/ioqueue_winnt.c
index bbaf87322d..89e0e95fb4 100644
--- a/pjlib/src/pj/ioqueue_winnt.c
+++ b/pjlib/src/pj/ioqueue_winnt.c
@@ -45,6 +45,8 @@
 #  include <mswsock.h>
 #endif
 
+/* For GetAcceptExSockaddrs() on MSVC2005 */
+#pragma comment(lib, "mswsock.lib")
 
 /* The address specified in AcceptEx() must be 16 more than the size of
  * SOCKADDR (source: MSDN).
diff --git a/pjlib/src/pjlib-test/fifobuf.c b/pjlib/src/pjlib-test/fifobuf.c
index b6fd486867..a8350026fd 100644
--- a/pjlib/src/pjlib-test/fifobuf.c
+++ b/pjlib/src/pjlib-test/fifobuf.c
@@ -105,7 +105,7 @@ static int fifobuf_rolling_test()
 
         /* Free cunks, leave some chunks for the next repeat */
         n = N/4 + (pj_rand() % (N/4));
-        while (pj_list_size(&chunks) > n) {
+        while ((int)pj_list_size(&chunks) > n) {
             chunk = chunks.next;
             pj_list_erase(chunk);
             pj_fifobuf_free(&fifo, chunk);
diff --git a/pjlib/src/pjlib-test/test.c b/pjlib/src/pjlib-test/test.c
index 6e358be725..ba1a9bbb3d 100644
--- a/pjlib/src/pjlib-test/test.c
+++ b/pjlib/src/pjlib-test/test.c
@@ -37,12 +37,14 @@
 pj_pool_factory *mem;
 
 struct test_app_t test_app = {
-    .param_echo_sock_type = 0,
-    .param_echo_server    = ECHO_SERVER_ADDRESS,
-    .param_echo_port      = ECHO_SERVER_START_PORT,
-    .param_log_decor      = PJ_LOG_HAS_NEWLINE | PJ_LOG_HAS_TIME |
-                            PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_INDENT,
-    .param_ci_mode        = PJ_FALSE,
+    {0},                                /* .ut_app */
+    0,                                  /* .param_echo_sock_type */
+    ECHO_SERVER_ADDRESS,                /* .param_echo_server */
+    ECHO_SERVER_START_PORT,             /* .param_echo_port */
+    PJ_LOG_HAS_NEWLINE | PJ_LOG_HAS_TIME |
+        PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_INDENT,
+                                        /* .param_log_decor */
+    PJ_FALSE,                           /* .param_ci_mode */
 };
 
 int null_func()
@@ -387,7 +389,7 @@ int test_inner(int argc, char *argv[])
         }
     }
 
-    if (argc-1 > 0 && stat.nruns==argc-1) {
+    if (argc-1 > 0 && (int)stat.nruns==argc-1) {
         /* cmdline specifies test(s) to run, and the number of runs
          * matches that. That means all requested tests have been run.
          */
diff --git a/pjlib/src/pjlib-test/test_util.h b/pjlib/src/pjlib-test/test_util.h
index 7eb4575c7e..28f5b08a8b 100644
--- a/pjlib/src/pjlib-test/test_util.h
+++ b/pjlib/src/pjlib-test/test_util.h
@@ -148,11 +148,12 @@ PJ_INLINE(void) ut_list_tests(ut_app_t *ut_app, const char *title)
 PJ_INLINE(pj_status_t) ut_run_tests(ut_app_t *ut_app, const char *title,
                                     int argc, char *argv[])
 {
-    pj_test_runner_param runner_prm;
-    pj_test_runner_param_default(&runner_prm);
     pj_test_runner *runner;
     pj_test_stat stat;
     pj_status_t status;
+    pj_test_runner_param runner_prm;
+
+    pj_test_runner_param_default(&runner_prm);
 
     if (ut_app->prm_shuffle) {
         PJ_LOG(3,(THIS_FILE, "Shuffling tests, random seed=%d",
diff --git a/pjnath/src/pjnath-test/ice_test.c b/pjnath/src/pjnath-test/ice_test.c
index 1189bfe7f0..27ec063344 100644
--- a/pjnath/src/pjnath-test/ice_test.c
+++ b/pjnath/src/pjnath-test/ice_test.c
@@ -1119,11 +1119,13 @@ int ice_test(void *p)
 
     rc = 0;
     if (test_id >= ICE_TEST_START_ARRAY) {
-        i = test_id - ICE_TEST_START_ARRAY;
-        struct sess_cfg_t *cfg = &sess_cfg[i];
+        struct sess_cfg_t *cfg;
         unsigned delay[] = { 50, 2000 };
         unsigned d;
 
+        i = test_id - ICE_TEST_START_ARRAY;
+        cfg = &sess_cfg[i];
+
         PJ_LOG(3,(THIS_FILE, "  %s", cfg->title));
 
         /* For each test item, test with various answer delay */
diff --git a/pjsip-apps/src/samples/pcaputil.c b/pjsip-apps/src/samples/pcaputil.c
index f87bd43dc3..075f878e98 100644
--- a/pjsip-apps/src/samples/pcaputil.c
+++ b/pjsip-apps/src/samples/pcaputil.c
@@ -427,7 +427,7 @@ static void pcap2wav(const struct args *args)
         ts_gap = pj_ntohl(pkt1.rtp->ts) - pj_ntohl(pkt0.rtp->ts) -
                  samples_cnt;
 
-        if (ts_gap <= param.info.clock_rate * GAP_IGNORE_SECONDS) { /* Ignore gap >30s */
+        if (ts_gap <= (long)param.info.clock_rate * GAP_IGNORE_SECONDS) { /* Ignore gap >30s */
             while (ts_gap >= (long)samples_per_frame) {
                 pcm_frame.buf = pcm;
                 pcm_frame.size = samples_per_frame * 2;
diff --git a/pjsip/src/pjsip-ua/sip_siprec.c b/pjsip/src/pjsip-ua/sip_siprec.c
index 96d4b69497..af33bf5955 100644
--- a/pjsip/src/pjsip-ua/sip_siprec.c
+++ b/pjsip/src/pjsip-ua/sip_siprec.c
@@ -114,7 +114,8 @@ PJ_DEF(pj_status_t) pjsip_siprec_init_module(pjsip_endpoint *endpt)
  */ 
 PJ_DEF(pj_status_t) pjsip_siprec_verify_require_hdr(pjsip_require_hdr *req_hdr)
 {
-    for (int i=0; i<req_hdr->count; ++i) {
+    unsigned i;
+    for (i=0; i<req_hdr->count; ++i) {
         /* Check request has the siprec value in the Require header.*/
         if (pj_stricmp(&req_hdr->values[i], &STR_SIPREC)==0)
         {
@@ -140,6 +141,7 @@ PJ_DEF(pj_status_t) pjsip_siprec_verify_request(pjsip_rx_data *rdata,
     pj_status_t status = PJ_SUCCESS;
     const char *warn_text = NULL;
     pjsip_hdr res_hdr_list;
+    unsigned mi;
 
     /* Init return arguments. */
     if (p_tdata) *p_tdata = NULL;
@@ -180,7 +182,7 @@ PJ_DEF(pj_status_t) pjsip_siprec_verify_request(pjsip_rx_data *rdata,
     }
 
     /* Check that the media attribute label exist in the SDP */
-    for (unsigned mi=0; mi<sdp_offer->media_count; ++mi) {
+    for (mi=0; mi<sdp_offer->media_count; ++mi) {
         if (!pjmedia_sdp_media_find_attr(sdp_offer->media[mi],
                                             &STR_LABEL, NULL)){
             code = PJSIP_SC_BAD_REQUEST;
@@ -263,22 +265,20 @@ PJ_DEF(pj_status_t) pjsip_siprec_verify_request(pjsip_rx_data *rdata,
  * Find siprec metadata from the message body
  */
 PJ_DEF(pj_status_t) pjsip_siprec_get_metadata(pj_pool_t *pool,
-                                            pjsip_msg_body *body,
-                                            pj_str_t* metadata)
+                                              pjsip_msg_body *body,
+                                              pj_str_t* metadata)
 {
-    pjsip_media_type application_metadata;
-
-    pjsip_media_type_init2(&application_metadata,
-                            "application", "rs-metadata");
-
+    pjsip_media_type app_metadata;
     pjsip_multipart_part *metadata_part;
-    metadata_part = pjsip_multipart_find_part(body, 
-                                            &application_metadata, NULL);   
+
+    PJ_UNUSED_ARG(pool);
+    pjsip_media_type_init2(&app_metadata, "application", "rs-metadata");
+    metadata_part = pjsip_multipart_find_part(body, &app_metadata, NULL);
 
     if(!metadata_part)
         return PJ_ENOTFOUND;
 
-    metadata->ptr = (char*)metadata_part->body->data;
+    metadata->ptr  = (char*)metadata_part->body->data;
     metadata->slen = metadata_part->body->len;
     
     return PJ_SUCCESS;
diff --git a/pjsip/src/pjsip/sip_util.c b/pjsip/src/pjsip/sip_util.c
index 886228dbc5..3d5c3912c5 100644
--- a/pjsip/src/pjsip/sip_util.c
+++ b/pjsip/src/pjsip/sip_util.c
@@ -1030,7 +1030,7 @@ PJ_DEF(pj_status_t) pjsip_process_route_set(pjsip_tx_data *tdata,
          tdata->tp_sel.type == PJSIP_TPSELECTOR_LISTENER) &&
         tdata->tp_sel.u.ptr)
     {
-        pjsip_transport_type_e tp_type;
+        pjsip_transport_type_e tp_type = PJSIP_TRANSPORT_UNSPECIFIED;
 
         if (tdata->tp_sel.type == PJSIP_TPSELECTOR_TRANSPORT)
             tp_type = tdata->tp_sel.u.transport->key.type;
diff --git a/pjsip/src/test/transport_test.c b/pjsip/src/test/transport_test.c
index 6f4fda98aa..c06f7f5f77 100644
--- a/pjsip/src/test/transport_test.c
+++ b/pjsip/src/test/transport_test.c
@@ -707,10 +707,11 @@ int transport_rt_test( pjsip_transport_type_e tp_type,
 
     /* Start threads! */
     for (i=0; i<THREADS; ++i) {
-        pj_time_val delay = {0, i*10};
+        pj_time_val delay = {0, 0};
         pj_thread_resume(g_rt[tid].rt_test_data[i].thread);
 
         /* Schedule first message transmissions. */
+        delay.msec = i*10;
         g_rt[tid].rt_test_data[i].tx_timer.user_data = (void*)(pj_ssize_t)1;
         pjsip_endpt_schedule_timer(endpt, &g_rt[tid].rt_test_data[i].tx_timer, &delay);
     }
diff --git a/pjsip/src/test/transport_udp_test.c b/pjsip/src/test/transport_udp_test.c
index 958e954e15..620b28ad9f 100644
--- a/pjsip/src/test/transport_udp_test.c
+++ b/pjsip/src/test/transport_udp_test.c
@@ -29,7 +29,7 @@ static pj_status_t multi_transport_test(pjsip_transport *tp[], unsigned max_tp)
     int rc;
     unsigned i, num_tp=0;
     pj_str_t s;
-    pjsip_transport *other_udp_tp = NULL, *udp_tp;
+    pjsip_transport *other_udp_tp = NULL, *udp_tp = NULL;
     pj_sockaddr_in rem_addr;    
     pjsip_tpselector tp_sel;
 
diff --git a/pjsip/src/test/tsx_uac_test.c b/pjsip/src/test/tsx_uac_test.c
index e43b62fba7..c4759a81ba 100644
--- a/pjsip/src/test/tsx_uac_test.c
+++ b/pjsip/src/test/tsx_uac_test.c
@@ -1372,7 +1372,7 @@ static int tsx_resolve_error_test(unsigned tid)
  */
 static int tsx_terminate_resolving_test(unsigned tid)
 {
-    unsigned prev_delay;
+    unsigned prev_delay = 0;
     pj_status_t status;
 
     PJ_LOG(3,(THIS_FILE, "  test3: terminate while resolving test"));