diff --git a/Library/Homebrew/cmd/pin.rb b/Library/Homebrew/cmd/pin.rb
index f92ba9e567..bc8fcad5d9 100644
--- a/Library/Homebrew/cmd/pin.rb
+++ b/Library/Homebrew/cmd/pin.rb
@@ -4,7 +4,7 @@ module Homebrew
   def pin
     raise FormulaUnspecifiedError if ARGV.named.empty?
 
-    ARGV.formulae.each do |f|
+    ARGV.resolved_formulae.each do |f|
       if f.pinned?
         opoo "#{f.name} already pinned"
       elsif !f.pinnable?