diff --git a/bullet/include/bullet/LinearMath/btVector3.h b/bullet/include/bullet/LinearMath/btVector3.h
index d52ff6fcbe..993d19780c 100644
--- a/bullet/include/bullet/LinearMath/btVector3.h
+++ b/bullet/include/bullet/LinearMath/btVector3.h
@@ -39,7 +39,7 @@ subject to the following restrictions:
 #endif
 
 
-#define BT_SHUFFLE(x,y,z,w) (((w)<<6 | (z)<<4 | (y)<<2 | (x)) && 0xFF)
+#define BT_SHUFFLE(x,y,z,w) (((w)<<6 | (z)<<4 | (y)<<2 | (x)) & 0xFF)
 //#define bt_pshufd_ps( _a, _mask ) (__m128) _mm_shuffle_epi32((__m128i)(_a), (_mask) )
 #define bt_pshufd_ps( _a, _mask ) _mm_shuffle_ps((_a), (_a), (_mask) )
 #define bt_splat3_ps( _a, _i ) bt_pshufd_ps((_a), BT_SHUFFLE(_i,_i,_i, 3) )