diff --git a/Headers/Foundation/NSBundle.h b/Headers/Foundation/NSBundle.h
index bb2f70ef7..a7a94f4d5 100644
--- a/Headers/Foundation/NSBundle.h
+++ b/Headers/Foundation/NSBundle.h
@@ -304,7 +304,7 @@ GS_EXPORT NSString* const NSLoadedClasses;
  */
 - (NSString*) localizedStringForKey: (NSString*)key
 			      value: (NSString*)value
-			      table: (NSString*)tableName;
+			      table: (NSString*)tableName __attribute__((format_arg(1)));
 
 /** Returns the absolute path to the resources directory of the bundle.  */
 - (NSString*) resourcePath;