diff --git a/React/Base/RCTConvert.m b/React/Base/RCTConvert.m
index 0a6031a91418cf..cd2feb8ad0ccad 100644
--- a/React/Base/RCTConvert.m
+++ b/React/Base/RCTConvert.m
@@ -53,12 +53,21 @@ + (type *)type:(id)json { return json; }
 
 RCT_JSON_CONVERTER(NSArray)
 RCT_JSON_CONVERTER(NSDictionary)
-RCT_JSON_CONVERTER(NSString)
 RCT_JSON_CONVERTER(NSNumber)
 
 RCT_CUSTOM_CONVERTER(NSSet *, NSSet, [NSSet setWithArray:json])
 RCT_CUSTOM_CONVERTER(NSData *, NSData, [json dataUsingEncoding:NSUTF8StringEncoding])
 
++ (NSString *)NSString:(id)json
+{
+  if ([json isKindOfClass:NSString.class]) {
+    return json;
+  } else if (json && json != (id)kCFNull) {
+    return [NSString stringWithFormat:@"%@",json];
+  }
+  return nil;
+}
+
 + (NSIndexSet *)NSIndexSet:(id)json
 {
   json = [self NSNumberArray:json];