diff --git a/libclamav/matcher-ac.c b/libclamav/matcher-ac.c
index 2ae8cdda19..708f79a458 100644
--- a/libclamav/matcher-ac.c
+++ b/libclamav/matcher-ac.c
@@ -2951,6 +2951,7 @@ cl_error_t cli_ac_addsig(struct cli_matcher *root, const char *virname, const ch
             cli_warnmsg("cli_ac_addsig: cannot use filter for trie\n");
             MPOOL_FREE(root->mempool, root->filter);
             root->filter = NULL;
+            return CL_EMALFDB;
         }
 
         /* TODO: should this affect maxpatlen? */
diff --git a/libclamav/matcher-bm.c b/libclamav/matcher-bm.c
index d4943bf30e..eb914f8caf 100644
--- a/libclamav/matcher-bm.c
+++ b/libclamav/matcher-bm.c
@@ -72,6 +72,7 @@ cl_error_t cli_bm_addpatt(struct cli_matcher *root, struct cli_bm_patt *pattern,
             cli_warnmsg("cli_bm_addpatt: cannot use filter for trie\n");
             MPOOL_FREE(root->mempool, root->filter);
             root->filter = NULL;
+            return CL_EMALFDB;
         }
         /* TODO: should this affect maxpatlen? */
     }
diff --git a/libclamav/readdb.c b/libclamav/readdb.c
index fc4ca4d108..da4861d448 100644
--- a/libclamav/readdb.c
+++ b/libclamav/readdb.c
@@ -4875,9 +4875,11 @@ cl_error_t cli_load(const char *filename, struct cl_engine *engine, unsigned int
     if (fs)
         fclose(fs);
 
-    if (engine->cb_sigload_progress) {
-        /* Let the progress callback function know how we're doing */
-        (void)engine->cb_sigload_progress(engine->num_total_signatures, *signo, engine->cb_sigload_progress_ctx);
+    if (CL_SUCCESS == ret) {
+        if (engine->cb_sigload_progress) {
+            /* Let the progress callback function know how we're doing */
+            (void)engine->cb_sigload_progress(engine->num_total_signatures, *signo, engine->cb_sigload_progress_ctx);
+        }
     }
 
     return ret;