1 files changed, 1 insertions, 1 deletions
diff --git a/rules.y b/rules.y
index cca58d7..31d70d0 100644
--- a/rules.y
+++ b/rules.y
@@ -845,7 +845,7 @@ lpostfix:
                 $$ = i;
               }|
         LBEGIN CONST
-            = { if(!isnat($2)||get_int($2)!=0)
+            = { if(!isnat($2)||big_toll($2)!=0)
                    syntax("%begin not followed by IDENTIFIER or 0\n");
                 $$ = 0; };