diff --git a/Library/Homebrew/sorbet/rbi/parlour.rbi b/Library/Homebrew/sorbet/rbi/parlour.rbi
index d6bf8bb460..e19705c707 100644
--- a/Library/Homebrew/sorbet/rbi/parlour.rbi
+++ b/Library/Homebrew/sorbet/rbi/parlour.rbi
@@ -18,6 +18,9 @@ module Debrew
 end
 
 class Formula
+  sig { returns(T::Boolean) }
+  def self.loaded_from_api?; end
+
   sig { returns(T::Boolean) }
   def self.on_system_blocks_exist?; end