diff --git a/app/models/repository.rb b/app/models/repository.rb
index be8e530c6507a9a3d6271f7c80143bfaebdfe0a5..e0b1901d188f3cd1092c17c3fc8042504e6ef51d 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -15,6 +15,7 @@ class Repository
     heads
     tags
     replace
+    #{REF_MERGE_REQUEST}
     #{REF_ENVIRONMENTS}
     #{REF_KEEP_AROUND}
     #{REF_PIPELINES}