diff --git a/Library/Homebrew/cmd/reinstall.rb b/Library/Homebrew/cmd/reinstall.rb
index e98e906f6a..e51aace2ad 100644
--- a/Library/Homebrew/cmd/reinstall.rb
+++ b/Library/Homebrew/cmd/reinstall.rb
@@ -8,7 +8,13 @@ module Homebrew
   def reinstall
     FormulaInstaller.prevent_build_flags unless DevelopmentTools.installed?
 
-    ARGV.resolved_formulae.each { |f| reinstall_formula(f) }
+    ARGV.resolved_formulae.each do |f|
+      if f.pinned?
+        onoe "#{f.full_name} is pinned. You must unpin it to reinstall."
+        next
+      end
+      reinstall_formula(f)
+    end
   end
 
   def reinstall_formula(f)