diff --git a/porting/nimble/src/os_mbuf.c b/porting/nimble/src/os_mbuf.c
index 8832fd2d1..3266e1d34 100644
--- a/porting/nimble/src/os_mbuf.c
+++ b/porting/nimble/src/os_mbuf.c
@@ -35,6 +35,7 @@
 
 #include "os/os.h"
 #include "os/os_trace_api.h"
+#include "modlog/modlog.h"
 
 #include <assert.h>
 #include <stddef.h>
@@ -186,6 +187,7 @@ os_msys_get(uint16_t dsize, uint16_t leadingspace)
     m = os_mbuf_get(pool, leadingspace);
     return (m);
 err:
+    MODLOG_DFLT(INFO,"_os_msys_find_pool failed (size %u)\n",dsize);
     return (NULL);
 }
 
@@ -205,6 +207,7 @@ os_msys_get_pkthdr(uint16_t dsize, uint16_t user_hdr_len)
     m = os_mbuf_get_pkthdr(pool, user_hdr_len);
     return (m);
 err:
+    MODLOG_DFLT(INFO,"_os_msys_find_pool failed (size %u)\n",dsize);
     return (NULL);
 }
 
diff --git a/porting/nimble/src/os_mempool.c b/porting/nimble/src/os_mempool.c
index 79630baea..65a47f37d 100644
--- a/porting/nimble/src/os_mempool.c
+++ b/porting/nimble/src/os_mempool.c
@@ -24,6 +24,7 @@
 #include <assert.h>
 #include <stdbool.h>
 #include "syscfg/syscfg.h"
+#include "modlog/modlog.h"
 #if !MYNEWT_VAL(OS_SYSVIEW_TRACE_MEMPOOL)
 #define OS_TRACE_DISABLE_FILE_API
 #endif
@@ -373,6 +374,10 @@ os_memblock_get(struct os_mempool *mp)
 
     os_trace_api_ret_u32(OS_TRACE_ID_MEMBLOCK_GET, (uint32_t)(uintptr_t)block);
 
+    if(!block){
+       MODLOG_DFLT(INFO,"os_memblock_get failed (size %u)\n",sizeof *block);
+    }
+
     return (void *)block;
 }