diff --git a/docs/grammar.txt b/docs/grammar.txt
index f70ec1342..9f4bf55db 100644
--- a/docs/grammar.txt
+++ b/docs/grammar.txt
@@ -72,7 +72,7 @@ Statement = IfStatement | TryStatement | WhileStatement | ForStatement | Block |
 ExpressionStatement = Expression
 IfStatement = 'if' '(' Expression ')' Statement ( 'else' Statement )?
 TryStatement = 'try' Expression ( 'returns' ParameterList )? Block CatchClause+
-CatchClause = 'catch' Identifier? ParameterList Block
+CatchClause = 'catch' ( Identifier? ParameterList )? Block
 WhileStatement = 'while' '(' Expression ')' Statement
 PlaceholderStatement = '_'
 SimpleStatement = VariableDefinition | ExpressionStatement