diff --git a/renderdocshim/renderdocshim.cpp b/renderdocshim/renderdocshim.cpp
index 92a5474b6..1d0c87b0e 100644
--- a/renderdocshim/renderdocshim.cpp
+++ b/renderdocshim/renderdocshim.cpp
@@ -151,7 +151,7 @@ void CheckHook()
   CloseHandle(datahandle);
 }
 
-DWORD CheckHookThread(LPVOID param)
+DWORD WINAPI CheckHookThread(LPVOID param)
 {
   CheckHook();
 
@@ -170,7 +170,7 @@ BOOL APIENTRY dll_entry(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpRese
 
     // create a thread so that we can perform more complex actions (DllMain must be minimal
     // in size, even this is a bit dodgy).
-    CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)&CheckHookThread, (LPVOID)hModule, 0, NULL);
+    CreateThread(NULL, 0, CheckHookThread, (LPVOID)hModule, 0, NULL);
   }
 
   return TRUE;