diff --git a/reactos/dll/win32/ws2_32_new/src/socklife.c b/reactos/dll/win32/ws2_32_new/src/socklife.c
index d1cd3a9a349..a0385e4a38c 100644
--- a/reactos/dll/win32/ws2_32_new/src/socklife.c
+++ b/reactos/dll/win32/ws2_32_new/src/socklife.c
@@ -293,7 +293,7 @@ WSAAccept(IN SOCKET s,
           OUT LPSOCKADDR addr,
           IN OUT LPINT addrlen,
           IN LPCONDITIONPROC lpfnCondition,
-          IN DWORD dwCallbackData)
+          IN DWORD_PTR dwCallbackData)
 {
     PWSPROCESS Process;
     PWSTHREAD Thread;