diff --git a/src/util/u_math.c b/src/util/u_math.c
index c58af911be7..63511554bf4 100644
--- a/src/util/u_math.c
+++ b/src/util/u_math.c
@@ -35,8 +35,10 @@
 #include <xmmintrin.h>
 /* This is defined in pmmintrin.h, but it can only be included when -msse3 is
  * used, so just define it here to avoid further. */
+#ifndef _MM_DENORMALS_ZERO_MASK
 #define _MM_DENORMALS_ZERO_MASK	0x0040
 #endif
+#endif
 
 
 /** 2^x, for x in [-1.0, 1.0) */