diff --git a/src/Lean/Parser/Command.lean b/src/Lean/Parser/Command.lean
index 096efe0117..54c4bb73d7 100644
--- a/src/Lean/Parser/Command.lean
+++ b/src/Lean/Parser/Command.lean
@@ -153,6 +153,7 @@ builtin_initialize
   register_parser_alias                                                 declVal
   register_parser_alias                                                 optDeclSig
   register_parser_alias                                                 openDecl
+  register_parser_alias                                                 docComment
 
 end Command