diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
index c2bfcbbcb93..79229313616 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
@@ -31,6 +31,7 @@
 #include "tgsi/tgsi_ureg.h"
 #include "tgsi/tgsi_dump.h"
 #include "util/u_memory.h"
+#include "util/u_math.h"
 
 union tgsi_any_token {
    struct tgsi_version version;