diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7bfd21b73..fbc222d5c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,7 +96,7 @@ FILE(GLOB SRC_H include/git2/*.h)
 
 # On Windows use specific platform sources
 IF (WIN32 AND NOT CYGWIN)
-	ADD_DEFINITIONS(-DWIN32 -D_DEBUG)
+	ADD_DEFINITIONS(-DWIN32 -D_DEBUG -D_WIN32_WINNT=0x0501)
 	FILE(GLOB SRC src/*.c src/transports/*.c src/xdiff/*.c src/win32/*.c)
 ELSE()
 	FILE(GLOB SRC src/*.c src/transports/*.c src/xdiff/*.c src/unix/*.c)
diff --git a/src/netops.c b/src/netops.c
index 2d200002f..057aff887 100644
--- a/src/netops.c
+++ b/src/netops.c
@@ -11,7 +11,6 @@
 #	include <sys/time.h>
 #	include <netdb.h>
 #else
-#	define _WIN32_WINNT 0x0501
 #	include <winsock2.h>
 #	include <Ws2tcpip.h>
 #	ifdef _MSC_VER