diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 8178f9582c..bb76a69cd7 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -254,9 +254,9 @@ class FormulaInstaller
 
         if (req.optional? || req.recommended?) && build.without?(req)
           Requirement.prune
-        elsif req.build? && dependent == f && pour_bottle?
+        elsif req.build? && dependent == self.f && pour_bottle?
           Requirement.prune
-        elsif req.build? && dependent != f && install_bottle_for_dep?(dependent, build)
+        elsif req.build? && dependent != self.f && install_bottle_for_dep?(dependent, build)
           Requirement.prune
         elsif install_requirement_default_formula?(req, build)
           dep = req.to_dependency