diff --git a/src/harness/include/harness/winsock.h b/src/harness/include/harness/winsock.h
index 51ab2ee9..46aa8303 100644
--- a/src/harness/include/harness/winsock.h
+++ b/src/harness/include/harness/winsock.h
@@ -23,7 +23,6 @@
 #include <sys/types.h>
 #include <unistd.h> // for close()
 
-#define closesocket(x) close(x)
 #define WSAEISCONN EISCONN
 #define WSAEINPROGRESS EINPROGRESS
 #define WSAEALREADY EALREADY
@@ -46,6 +45,7 @@ int WSAStartup(int version, WSADATA* data);
 int WSAGetLastError(void);
 int WSACleanup(void);
 int ioctlsocket(int handle, long cmd, unsigned long* argp);
+int closesocket(int handle);
 
 #endif /* _WIN32 */
 
diff --git a/src/harness/win95/winsock.c b/src/harness/win95/winsock.c
index 15e86e83..7d47f344 100644
--- a/src/harness/win95/winsock.c
+++ b/src/harness/win95/winsock.c
@@ -24,4 +24,8 @@ int ioctlsocket(int handle, long cmd, unsigned long* argp) {
     return fcntl(handle, F_SETFL, flags);
 }
 
+int closesocket(int handle) {
+    return close(handle);
+}
+
 #endif