diff --git a/src/utils/os_zephyr.c b/src/utils/os_zephyr.c
index b2c2e41631..5bd725ca13 100644
--- a/src/utils/os_zephyr.c
+++ b/src/utils/os_zephyr.c
@@ -18,6 +18,10 @@ int clock_gettime(clockid_t clock_id, struct timespec *ts);
 #include "includes.h"
 #include "os.h"
 
+#if !defined(CONFIG_WIFI_NM_WPA_SUPPLICANT_GLOBAL_HEAP)
+K_HEAP_DEFINE(wifi_nm_wpa_supplicant_mem_pool, CONFIG_WIFI_NM_WPA_SUPPLICANT_HEAP);
+#endif /* CONFIG_WIFI_NM_WPA_SUPPLICANT_GLOBAL_HEAP */
+
 void os_sleep(os_time_t sec, os_time_t usec)
 {
 	k_sleep(K_USEC(usec + USEC_PER_SEC * sec));
@@ -220,12 +224,22 @@ void *os_memdup(const void *src, size_t len)
 
 void *os_malloc(size_t size)
 {
+#if defined(CONFIG_WIFI_NM_WPA_SUPPLICANT_GLOBAL_HEAP)
 	return k_malloc(size);
+#else
+	return sys_heap_noalign_alloc(&wifi_nm_wpa_supplicant_mem_pool.heap, 0, size);
+#endif /* CONFIG_WIFI_NM_WPA_SUPPLICANT_GLOBAL_HEAP */
 }
 
 void os_free(void *ptr)
 {
-	k_free(ptr);
+	if (ptr) {
+#if defined(CONFIG_WIFI_NM_WPA_SUPPLICANT_GLOBAL_HEAP)
+		k_free(ptr);
+#else
+		k_heap_free(&wifi_nm_wpa_supplicant_mem_pool, ptr);
+#endif /* CONFIG_WIFI_NM_WPA_SUPPLICANT_GLOBAL_HEAP */
+	}
 }
 
 void *os_realloc(void *ptr, size_t newsize)
@@ -255,7 +269,7 @@ void *os_realloc(void *ptr, size_t newsize)
 
 void *os_zalloc(size_t size)
 {
-	void *p = k_malloc(size);
+	void *p = os_malloc(size);
 
 	if (p != NULL) {
 		(void)memset(p, 0, size);