CB-11407 ios: added extern keyword to constants to fix phonegap-webview-ios template issue.
diff --git a/src/ios/CDVFile.h b/src/ios/CDVFile.h
index 33630c0..987c66b 100644
--- a/src/ios/CDVFile.h
+++ b/src/ios/CDVFile.h
@@ -20,8 +20,8 @@
 #import <Foundation/Foundation.h>
 #import <Cordova/CDVPlugin.h>
 
-NSString* const kCDVAssetsLibraryPrefix;
-NSString* const kCDVFilesystemURLPrefix;
+extern NSString* const kCDVAssetsLibraryPrefix;
+extern NSString* const kCDVFilesystemURLPrefix;
 
 enum CDVFileError {
     NO_ERROR = 0,