diff --git a/src/gallium/drivers/llvmpipe/lp_test_arit.c b/src/gallium/drivers/llvmpipe/lp_test_arit.c
index 44d416236dc..b446f04e842 100644
--- a/src/gallium/drivers/llvmpipe/lp_test_arit.c
+++ b/src/gallium/drivers/llvmpipe/lp_test_arit.c
@@ -27,6 +27,7 @@
 
 
 #include <limits.h>
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>