diff --git a/code/core/OS/OpenSpy.h b/code/core/OS/OpenSpy.h
index 1d265008..32da4ea9 100644
--- a/code/core/OS/OpenSpy.h
+++ b/code/core/OS/OpenSpy.h
@@ -208,7 +208,7 @@ namespace OS {
 }
 
 #ifdef _WIN32
-const char* inet_ntop(int af, const void *src, char *dst, size_t size);
+const char* inet_ntop(int af, const void *src, char *dst, socklen_t size);
 #endif