diff --git a/Engine/source/T3D/physics/bullet/bt.h b/Engine/source/T3D/physics/bullet/bt.h
index b2c514ff5..394fdc7de 100644
--- a/Engine/source/T3D/physics/bullet/bt.h
+++ b/Engine/source/T3D/physics/bullet/bt.h
@@ -24,10 +24,14 @@
 #define _BULLET_H_
 
 // NOTE: We set these defines which bullet needs here.
-#ifdef TORQUE_OS_WIN
+#if defined TORQUE_OS_WIN && !defined(WIN32)
 #define WIN32
 #endif
 
+#ifdef TORQUE_CPU_X86
+#define __BT_SKIP_UINT64_H
+#endif
+
 // NOTE: All the Bullet includes we use should be here and
 // nowhere else.... beware!