diff --git a/LBXScan.podspec b/LBXScan.podspec
index 4911a10..84b4380 100644
--- a/LBXScan.podspec
+++ b/LBXScan.podspec
@@ -10,6 +10,7 @@ Pod::Spec.new do |s|
     s.source_files = 'LBXScan/*.{h,m}'
     s.resource     = 'LBXScan/LBXScan+UIKit/CodeScan.bundle'
     s.requires_arc = true
+    s.prefix_header_contents = '#import <Foundation/Foundation.h>'
     s.subspec 'LBXScanCore' do |ss|
       ss.source_files = 'LBXScan/LBXScanCore/*.{h,m}'
       ss.subspec 'LibZXing' do |sss|