diff --git a/src/common/parser.y b/src/common/parser.y
index 591c10c551..6cca59c6e7 100644
--- a/src/common/parser.y
+++ b/src/common/parser.y
@@ -78,8 +78,6 @@ command	:       WORD PERIOD
 
 expr	:	WORD OPEN arglist CLOSE 
 			{$$ = proio_cons(wxmake_word($1), $3); free($1);}
-	|	OPEN_SQUARE CLOSE_SQUARE
-                        {$$ = proio_cons(NULL, NULL);}
 	|	OPEN_SQUARE arglist CLOSE_SQUARE
 			{$$ = $2; }
 	;