@@ -102,10 +102,13 @@
 	OFString *ret;
 #ifdef HAVE_STRERROR_R
 	char buffer[256];
 #endif
 
+	if (errNo == 0)
+		return @"Unknown error";
+
 #ifdef OF_WINDOWS
 	/*
 	 * These were translated from WSAE* errors to errno and thus Win32's
 	 * strerror_r() does not know about them.
 	 *