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-rw-r--r--src/GF/Canon/GFC.cf2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/GF/Canon/GFC.cf b/src/GF/Canon/GFC.cf
index 236bd72ca..698a589b9 100644
--- a/src/GF/Canon/GFC.cf
+++ b/src/GF/Canon/GFC.cf
@@ -16,7 +16,7 @@ MTTrans. ModType ::= "transfer" Ident ":" Ident "->" Ident ;
separator Module "" ;
-Ext. Extend ::= Ident "**" ;
+Ext. Extend ::= [Ident] "**" ;
NoExt. Extend ::= ;
Opens. Open ::= "open" [Ident] "in" ;