diff --git a/Library/Homebrew/version/null.rb b/Library/Homebrew/version/null.rb
index 08616aa2fe..b27e0074df 100644
--- a/Library/Homebrew/version/null.rb
+++ b/Library/Homebrew/version/null.rb
@@ -68,12 +68,12 @@ class Version
       NULL_TOKEN
     end
 
-    sig { override.returns(Version) }
+    sig { override.returns(T.self_type) }
     def major_minor
       self
     end
 
-    sig { override.returns(Version) }
+    sig { override.returns(T.self_type) }
     def major_minor_patch
       self
     end