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-rw-r--r--src/common/compat.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/common/compat.h b/src/common/compat.h
index 7e6058a547..011b9c8674 100644
--- a/src/common/compat.h
+++ b/src/common/compat.h
@@ -396,7 +396,7 @@ typedef int socklen_t;
#ifdef MS_WINDOWS
#define tor_socket_t intptr_t
-#define SOCKET_OK(s) ((s) != INVALID_SOCKET)
+#define SOCKET_OK(s) ((unsigned)(s) != INVALID_SOCKET)
#else
#define tor_socket_t int
#define SOCKET_OK(s) ((s) >= 0)