@@ -116,11 +116,11 @@
 		@throw [OFSetOptionFailedException exceptionWithObject: self
 								 errNo: errno];
 
 	_canBlock = canBlock;
 #elif defined(OF_WINDOWS)
-	u_long v = canBlock;
+	u_long v = !canBlock;
 
 	if (ioctlsocket(_socket, FIONBIO, &v) == SOCKET_ERROR)
 		@throw [OFSetOptionFailedException
 		    exceptionWithObject: self
 				  errNo: OFSocketErrNo()];