diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h
index fb73b2d59ff..3cd1b44b0e9 100644
--- a/src/mesa/swrast/s_tritemp.h
+++ b/src/mesa/swrast/s_tritemp.h
@@ -92,7 +92,7 @@
 
 
 #ifndef MAX_GLUINT
-#define MAX_GLUINT	0xffffffff
+#define MAX_GLUINT	0xffffffffu
 #endif