Index: src/mesa/swrast_setup/ss_triangle.c
===================================================================
--- src/mesa/swrast_setup/ss_triangle.c	(revision 8534)
+++ src/mesa/swrast_setup/ss_triangle.c	(working copy)
@@ -159,7 +159,7 @@
 }
 
 #define SS_COLOR(a,b) UNCLAMPED_FLOAT_TO_RGBA_CHAN(a,b)
-#define SS_SPEC(a,b) UNCLAMPED_FLOAT_TO_RGB_CHAN(a,b)
+#define SS_SPEC(a,b) COPY_4V(a,b)
 #define SS_IND(a,b) (a = b)
 
 #define IND (0)