diff --git a/Code/Support/RKDictionaryUtilities.m b/Code/Support/RKDictionaryUtilities.m
index 3842e19f..5f2a31a9 100644
--- a/Code/Support/RKDictionaryUtilities.m
+++ b/Code/Support/RKDictionaryUtilities.m
@@ -13,7 +13,7 @@ NSDictionary * RKDictionaryByMergingDictionaryWithDictionary(NSDictionary *dict1
     NSMutableDictionary *mergedDictionary = [dict1 mutableCopy];
 
     [dict2 enumerateKeysAndObjectsUsingBlock:^(id key2, id obj2, BOOL *stop) {
-        id obj1 = dict1[key2];
+        id obj1 = [dict1 valueForKey:key2];
         if ([obj1 isKindOfClass:[NSDictionary class]] && [obj2 isKindOfClass:[NSDictionary class]]) {
             NSDictionary *mergedSubdict = RKDictionaryByMergingDictionaryWithDictionary(obj1, obj2);
             [mergedDictionary setValue:mergedSubdict forKey:key2];