diff --git a/Library/Homebrew/extend/ARGV.rb b/Library/Homebrew/extend/ARGV.rb
index 2da6141c79..4a497957b3 100644
--- a/Library/Homebrew/extend/ARGV.rb
+++ b/Library/Homebrew/extend/ARGV.rb
@@ -34,7 +34,7 @@ module HomebrewArgvExtension
           f.build = tab
           if f.head? && tab.tabfile
             k = Keg.new(tab.tabfile.parent)
-            f.version.update_commit(k.version.version.commit)
+            f.version.update_commit(k.version.version.commit) if k.version.head?
           end
         end
         f
diff --git a/Library/Homebrew/formulary.rb b/Library/Homebrew/formulary.rb
index 20f115f139..f7a4be817f 100644
--- a/Library/Homebrew/formulary.rb
+++ b/Library/Homebrew/formulary.rb
@@ -246,7 +246,7 @@ class Formulary
       end
     end
     f.build = tab
-    f.version.update_commit(keg.version.version.commit) if f.head?
+    f.version.update_commit(keg.version.version.commit) if f.head? && keg.version.head?
     f
   end