1 files changed, 6 insertions, 6 deletions
diff --git a/pc.y b/pc.y
index f6f4d33..a3a5df9 100644
--- a/pc.y
+++ b/pc.y
@@ -162,20 +162,20 @@ sub_prog_head
 ;
 
 arguments
-	:id_list ':' type
-	{
-	}
-	|param_list ';' id_list ':' type
+	:'(' param_list ')'
 	{
 	}
+	|/*empty*/
 ;
 
 param_list
 	:id_list ':' type
 	{
 	}
-	|param_list ':' type
-	;
+	|param_list ';' id_list ':' type
+	{
+	}
+;
 
 compound_statement
 	:BEG opt_statements END