diff --git a/lib/core/src/unix/pkbuf.c b/lib/core/src/unix/pkbuf.c
index 6ce2e4877..f51e62a95 100644
--- a/lib/core/src/unix/pkbuf.c
+++ b/lib/core/src/unix/pkbuf.c
@@ -568,7 +568,9 @@ void *core_realloc(void *ptr, size_t size)
     }
 
     d_assert(p->clbuf, return NULL, "Null param");
-    if (size > (p->clbuf->size - headroom))
+#if 0
+    if (size >= (p->clbuf->size - headroom))
+#endif
     {
         void *new = NULL;
 
@@ -580,9 +582,11 @@ void *core_realloc(void *ptr, size_t size)
 
         return new;
     }
+#if 0
     else
     {
         return ptr;
     }
+#endif
 }
 
diff --git a/test/s1ap_message_test.c b/test/s1ap_message_test.c
index 4fd05628e..c68c39b8a 100644
--- a/test/s1ap_message_test.c
+++ b/test/s1ap_message_test.c
@@ -136,6 +136,43 @@ static void s1ap_message_test5(abts_case *tc, void *data)
     pkbuf_free(pkbuf);
 }
 
+static void s1ap_message_test6(abts_case *tc, void *data)
+{
+    pkbuf_t *s1apbuf = NULL;
+    int encoded;
+    s1ap_message_t message;
+    S1ap_DownlinkNASTransport_IEs_t *ies = 
+        &message.s1ap_DownlinkNASTransport_IEs;
+    S1ap_NAS_PDU_t *nasPdu = &ies->nas_pdu;
+    char buffer[1024];
+    char *_result = 
+    "000b4080 8c000003 00000002 00010008 00020001 001a0079 78efefef efefefef"
+    "efefefef efefefef efefefef efefefef efefefef efefefef efefefef efefefef"
+    "efefefef efefefef efefefef efefefef efefefef efefefef efefefef efefefef"
+    "efefefef efefefef efefefef efefefef efefefef efefefef efefefef efefefef"
+    "efefefef efefefef efefefef efefefef ef";
+
+    memset(&message, 0, sizeof(s1ap_message_t));
+
+    ies->mme_ue_s1ap_id = 1;
+    ies->eNB_UE_S1AP_ID = 1;
+
+    nasPdu->size = 120;
+    nasPdu->buf = core_calloc(nasPdu->size, sizeof(c_uint8_t));
+    for (int i = 0; i < nasPdu->size; i++)
+        nasPdu->buf[i] = 0xef;
+
+    message.procedureCode = S1ap_ProcedureCode_id_downlinkNASTransport;
+    message.direction = S1AP_PDU_PR_initiatingMessage;
+
+    encoded = s1ap_encode_pdu(&s1apbuf, &message);
+    s1ap_free_pdu(&message);
+    ABTS_TRUE(tc, memcmp(CORE_HEX(_result, strlen(_result), buffer),
+            s1apbuf->payload, s1apbuf->len) == 0);
+
+    pkbuf_free(s1apbuf);
+}
+
 abts_suite *test_s1ap_message(abts_suite *suite)
 {
     suite = ADD_SUITE(suite)
@@ -145,6 +182,7 @@ abts_suite *test_s1ap_message(abts_suite *suite)
     abts_run_test(suite, s1ap_message_test3, NULL);
     abts_run_test(suite, s1ap_message_test4, NULL);
     abts_run_test(suite, s1ap_message_test5, NULL);
+    abts_run_test(suite, s1ap_message_test6, NULL);
 
     return suite;
 }