diff --git a/phalcon/mvc/micro.zep b/phalcon/mvc/micro.zep
index 028ca1e137f..4de7caf37a0 100644
--- a/phalcon/mvc/micro.zep
+++ b/phalcon/mvc/micro.zep
@@ -997,7 +997,7 @@ class Micro extends Injectable implements \ArrayAccess
 		 */
 		if typeof returnedValue == "string" {
 			let response = <ResponseInterface> dependencyInjector->getShared("response");
-			if !response->isSent() {
+			if this->isSendable(response) {
 				response->setContent(returnedValue);
 				response->send();
 			}
@@ -1007,19 +1007,26 @@ class Micro extends Injectable implements \ArrayAccess
 		 * Check if the returned object is already a response
 		 */
 		if typeof returnedValue == "object" {
-			if returnedValue instanceof ResponseInterface {
-				/**
-				 * Automatically send the response
-				 */
-				 if !returnedValue->isSent() {
-				 	returnedValue->send();
-				 }
+			/**
+			 * Automatically send the response
+			 */
+			if this->isSendable(returnedValue) {
+				returnedValue->send();
 			}
 		}
 
 		return returnedValue;
 	}
 
+	/**
+	 * @param object response
+	 * @return bool
+	 **/
+	private function isSendable(response) -> boolean
+	{
+		return response instanceof ResponseInterface && method_exists(response, "isSent") && !response->isSent();
+	}
+
 	/**
 	 * Stops the middleware execution avoiding than other middlewares be executed
 	 */