diff --git a/source/blender/python/api2_2x/Material.c b/source/blender/python/api2_2x/Material.c
index ef19fab462a..2e6bd326fb6 100644
--- a/source/blender/python/api2_2x/Material.c
+++ b/source/blender/python/api2_2x/Material.c
@@ -109,7 +109,7 @@
 #define EXPP_MAT_SUBSIZE_MAX			25.0
 
 #define EXPP_MAT_HARD_MIN				 1
-#define EXPP_MAT_HARD_MAX		 255	/* 127 with MODE HALO ON */
+#define EXPP_MAT_HARD_MAX		 511	/* 127 with MODE HALO ON */
 #define EXPP_MAT_HALOSEED_MIN		 0
 #define EXPP_MAT_HALOSEED_MAX    255
 #define EXPP_MAT_NFLARES_MIN		 1