diff --git a/infer/models/objc/src/NSHTTPCookie.m b/infer/models/objc/src/NSHTTPCookie.m
index df0cb6fb0..33516fbb2 100644
--- a/infer/models/objc/src/NSHTTPCookie.m
+++ b/infer/models/objc/src/NSHTTPCookie.m
@@ -11,7 +11,7 @@
 #import <Foundation/NSString.h>
 
 @interface NSHTTPCookie : NSObject
-@property(readonly, copy) NSString* value;
+@property(nonatomic, readonly, copy) NSString* value;
 @end
 
 @implementation NSHTTPCookie