diff --git a/util.c b/util.c
index 2de5c1ca..4c53df29 100644
--- a/util.c
+++ b/util.c
@@ -2472,7 +2472,7 @@ int _cgsem_mswait(cgsem_t *cgsem, int ms, const char *file, const char *func, co
 	timeraddspec(&abs_timeout, &ts_now);
 	ret = sem_timedwait(cgsem, &abs_timeout);
 
-	if (unlikely(ret && ret != ETIMEDOUT))
+	if (unlikely(ret && !sock_timeout()))
 		quitfrom(1, file, func, line, "Failed to sem_timedwait errno=%d cgsem=0x%p", errno, cgsem);
 	return ret;
 }
diff --git a/util.h b/util.h
index 07860659..8127e784 100644
--- a/util.h
+++ b/util.h
@@ -20,6 +20,10 @@
 	{
 		return (errno == EAGAIN || errno == EWOULDBLOCK);
 	}
+	static inline bool sock_timeout(void)
+	{
+		return (errno == ETIMEDOUT);
+	}
 #elif defined WIN32
 	#include <ws2tcpip.h>
 	#include <winsock2.h>
@@ -37,6 +41,10 @@
 	{
 		return (WSAGetLastError() == WSAEWOULDBLOCK);
 	}
+	static inline bool sock_timeout(void)
+	{
+		return (WSAGetLastError() == WSAETIMEDOUT);
+	}
 	#ifndef SHUT_RDWR
 	#define SHUT_RDWR SD_BOTH
 	#endif