diff --git a/src/libCom/post.h b/src/libCom/post.h
index e43e6429e..0f99ca214 100644
--- a/src/libCom/post.h
+++ b/src/libCom/post.h
@@ -111,4 +111,4 @@
 #define		CONST_D2R	73
 #define		CONST_R2D	74
 #define		NINT		75
-#define		END_STACK	-1
+#define		END_STACK	0xff