diff --git a/EGkCalcPocketing.h b/EGkCalcPocketing.h
index 8f0dddf..e5eb71a 100644
--- a/EGkCalcPocketing.h
+++ b/EGkCalcPocketing.h
@@ -38,7 +38,8 @@ enum { POCKET_ZIGZAG = 0,
        POCKET_SPIRALOUT = 3,
        POCKET_CONFORMAL_ZIGZAG = 4} ;
 
-enum { TEMP_PROP_INVALID = -1,
+enum { TEMP_PROP_SMOOTH = -2,
+       TEMP_PROP_INVALID = -1,
        TEMP_PROP_CLOSE_EDGE = 0,
        TEMP_PROP_OPEN_EDGE = 1,
        TEMP_PROP_OUT_START = 2,