1 files changed, 4 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/migration/compatibility.rb b/activerecord/lib/active_record/migration/compatibility.rb
index 69bd9ff1cf..74833f938f 100644
--- a/activerecord/lib/active_record/migration/compatibility.rb
+++ b/activerecord/lib/active_record/migration/compatibility.rb
@@ -11,7 +11,7 @@ module ActiveRecord
         const_get(name)
       end
 
-      V5_0 = Current
+      V5_1 = Current
 
       module FourTwoShared
         module TableDefinition
@@ -102,6 +102,9 @@ module ActiveRecord
         end
       end
 
+      class V5_0 < V5_1
+      end
+
       class V4_2 < V5_0
         # 4.2 is defined as a module because it needs to be shared with
         # Legacy. When the time comes, V5_0 should be defined straight