diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index b764cfb5d9018..329623be703be 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -2579,7 +2579,8 @@ def setup_home(home)
   # Returns a list of Dependency objects that are declared in the formula.
   # @private
   def declared_runtime_dependencies
-    recursive_dependencies do |_, dependency|
+    cache_key = "Formula#declared_runtime_dependencies" unless build.any_args_or_options?
+    Dependency.expand(self, cache_key: cache_key) do |_, dependency|
       Dependency.prune if dependency.build?
       next if dependency.required?