diff --git a/Formula/otx.rb b/Formula/otx.rb
index 7db07512d03..255f3583fd4 100644
--- a/Formula/otx.rb
+++ b/Formula/otx.rb
@@ -7,6 +7,10 @@ class Otx < Formula
   depends_on :xcode # For working xcodebuild.
 
   def install
+    inreplace 'otx.xcodeproj/project.pbxproj' do |s|
+      s.gsub! "MacOSX10.6.sdk", "MacOSX#{MacOS.version}.sdk"
+    end
+
     system 'xcodebuild SYMROOT=build'
     build = buildpath/'build/Release'
     bin.install build+"otx"