diff --git a/r5dev/tier0/threadtools.cpp b/r5dev/tier0/threadtools.cpp
index ff03656e..6955b963 100644
--- a/r5dev/tier0/threadtools.cpp
+++ b/r5dev/tier0/threadtools.cpp
@@ -9,7 +9,7 @@
 #include "core/stdafx.h"
 #include "threadtools.h"
 
-LONG ThreadInterlockedCompareExchange64(LONG volatile* pDest, int64 value, int64 comperand)
+int32 ThreadInterlockedCompareExchange(LONG volatile* pDest, int32 value, int32 comperand)
 {
 	return _InterlockedCompareExchange(pDest, comperand, value);
 }
diff --git a/r5dev/tier0/threadtools.h b/r5dev/tier0/threadtools.h
index 19e5c825..248cfd90 100644
--- a/r5dev/tier0/threadtools.h
+++ b/r5dev/tier0/threadtools.h
@@ -65,7 +65,7 @@ ThreadId_t ThreadGetCurrentId();
 //
 //-----------------------------------------------------------------------------
 
-LONG ThreadInterlockedCompareExchange64(LONG volatile* pDest, int64 value, int64 comperand);
+int32 ThreadInterlockedCompareExchange(LONG volatile* pDest, int32 value, int32 comperand);
 bool ThreadInterlockedAssignIf(LONG volatile* p, int32 value, int32 comperand);
 int64 ThreadInterlockedCompareExchange64(int64 volatile* pDest, int64 value, int64 comperand);
 bool ThreadInterlockedAssignIf64(int64 volatile* pDest, int64 value, int64 comperand);