diff --git a/mongoose.c b/mongoose.c
index 70692322..e6d2351e 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -3593,7 +3593,9 @@ static bool mg_socketpair(SOCKET sp[2], union usa usa[2]) {
 
 void mg_mgr_wakeup(struct mg_connection *c, const void *buf, size_t len) {
   if (buf == NULL || len == 0) buf = (void *) "", len = 1;
-  send((SOCKET) (size_t) c->pfn_data, (const char *) buf, len, MSG_NONBLOCKING);
+  if ((size_t) send((SOCKET) (size_t) c->pfn_data, (const char *) buf, len,
+                    MSG_NONBLOCKING) != len)
+    (void) 0;
 }
 
 static void pf1(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
diff --git a/src/sock.c b/src/sock.c
index f3a4f291..38f510df 100644
--- a/src/sock.c
+++ b/src/sock.c
@@ -426,7 +426,9 @@ static bool mg_socketpair(SOCKET sp[2], union usa usa[2]) {
 
 void mg_mgr_wakeup(struct mg_connection *c, const void *buf, size_t len) {
   if (buf == NULL || len == 0) buf = (void *) "", len = 1;
-  send((SOCKET) (size_t) c->pfn_data, (const char *) buf, len, MSG_NONBLOCKING);
+  if ((size_t) send((SOCKET) (size_t) c->pfn_data, (const char *) buf, len,
+                    MSG_NONBLOCKING) != len)
+    (void) 0;
 }
 
 static void pf1(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {