diff -r 412b06dc0162 -r 943548492a47 libidav/davqlparser.h
--- a/libidav/davqlparser.h	Wed May 20 11:14:33 2015 +0200
+++ b/libidav/davqlparser.h	Sun May 24 20:27:51 2015 +0200
@@ -171,7 +171,7 @@
  * AddOperator     = "+" | "-";
  * UnaryOperator   = "+" | "-" | "~";
  * 
- * FunctionCall    = Identifier, "(", ArgumentList, ")";
+ * FunctionCall    = Identifier, "(", [ArgumentList], ")";
  * ArgumentList    = Expression, {",", Expression};
  * Identifier      = IdentifierChar - ?Digit?, {IdentifierChar}
  *                 | "`", ?Character? - "`", {?Character? - "`"}, "`";