diff --git a/src/BulletMultiThreaded/PpuAddressSpace.h b/src/BulletMultiThreaded/PpuAddressSpace.h
index 93c83648c..62553a7ce 100644
--- a/src/BulletMultiThreaded/PpuAddressSpace.h
+++ b/src/BulletMultiThreaded/PpuAddressSpace.h
@@ -8,7 +8,7 @@
 #pragma warning (disable: 4312)
 #endif //WIN32
 
-#ifdef USE_ADDR64
+#if defined(_WIN64) || defined(__LP64__) || defined(__x86_64__) || defined(USE_ADDR64)
 typedef uint64_t ppu_address_t;
 #else
 typedef uint32_t ppu_address_t;