diff --git a/docs/grammar.txt b/docs/grammar.txt
index ee655216f..c67a8a4a2 100644
--- a/docs/grammar.txt
+++ b/docs/grammar.txt
@@ -137,7 +137,8 @@ Ufixed = 'ufixed' | 'ufixed0x8' | 'ufixed0x16' | 'ufixed0x24' | 'ufixed0x32' | '
 
 InlineAssemblyBlock = '{' AssemblyItem* '}'
 
-AssemblyItem = Identifier | FunctionalAssemblyExpression | InlineAssemblyBlock | AssemblyLocalBinding | AssemblyAssignment | NumberLiteral | StringLiteral | HexLiteral
+AssemblyItem = Identifier | FunctionalAssemblyExpression | InlineAssemblyBlock | AssemblyLocalBinding | AssemblyAssignment | AssemblyLabel | NumberLiteral | StringLiteral | HexLiteral
 AssemblyLocalBinding = 'let' Identifier ':=' FunctionalAssemblyExpression
 AssemblyAssignment = ( Identifier ':=' FunctionalAssemblyExpression ) | ( '=:' Identifier )
+AssemblyLabel = Identifier ':'
 FunctionalAssemblyExpression = Identifier '(' AssemblyItem? ( ',' AssemblyItem )* ')'