diff --git a/common/Resources/ti.internal/extensions/ti/ti.blob.js b/common/Resources/ti.internal/extensions/ti/ti.blob.js
index 2590c7c3077..5106a72d962 100644
--- a/common/Resources/ti.internal/extensions/ti/ti.blob.js
+++ b/common/Resources/ti.internal/extensions/ti/ti.blob.js
@@ -7,22 +7,10 @@
 /* globals OS_IOS, OS_VERSION_MAJOR */
 const buffer = Ti.createBuffer({ value: '' });
 const blob = buffer.toBlob();
-
-if (OS_IOS) {
-	blob.constructor.prototype.toString = function () {
-		const value = this.text;
-		return (value === undefined) ? '[object TiBlob]' :  value;
-	};
-
-	if (OS_VERSION_MAJOR < 11) {
-		// This is hack to fix TIMOB-27707. Remove it after minimum target set iOS 11+
-		setTimeout(function () {}, Infinity);
-	}
-}
-
+const BlobPrototype = Object.getPrototypeOf(blob);
 // Web Blob has an arrayBuffer() method that returns a Promise
 // https://developer.mozilla.org/en-US/docs/Web/API/Blob/arrayBuffer
-blob.constructor.prototype.arrayBuffer = function () {
+BlobPrototype.arrayBuffer = function () {
 	return new Promise((resolve, reject) => {
 		let buf;
 		try {
@@ -33,3 +21,17 @@ blob.constructor.prototype.arrayBuffer = function () {
 		resolve(buf);
 	});
 };
+
+if (OS_IOS) {
+	if (OS_VERSION_MAJOR < 13) {
+		BlobPrototype.toString = function () {
+			const value = this.text;
+			return (value === undefined) ? '[object TiBlob]' :  value;
+		};
+	}
+
+	if (OS_VERSION_MAJOR < 11) {
+		// This is hack to fix TIMOB-27707. Remove it after minimum target set iOS 11+
+		setTimeout(function () {}, Infinity);
+	}
+}
diff --git a/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m b/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m
index 12322a66c1e..49484a5b34c 100644
--- a/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m
+++ b/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m
@@ -454,7 +454,7 @@ - (NSString *)toString
   if (t != nil) {
     return t;
   }
-  return [super toString];
+  return @"[object TiBlob]";
 }
 
 static void jsArrayBufferFreeDeallocator(void *data, void *ctx)