diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a4253f..ea0f96a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 2.8)
 
 project (EasyPR)
 
-list(APPEND CMAKE_CXX_FLAGS "-std=c++0x")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 
 find_package(OpenCV REQUIRED)
 
diff --git a/src/core/plate_locate.cpp b/src/core/plate_locate.cpp
index ddd8602..3bf12be 100644
--- a/src/core/plate_locate.cpp
+++ b/src/core/plate_locate.cpp
@@ -1583,8 +1583,9 @@ int CPlateLocate::plateLocate(Mat src, vector<Mat>& resultVec, int index)
 		//large the rect for more
 		if (!verifySizes(mr))
 		{
-			cv::Mat& roi = dst_blue(safeBoundRect);
+			cv::Mat roi = dst_blue(safeBoundRect);
 			roi.setTo(0);
+            cv::swap(roi, dst_blue);
 		}
 		else
 		{
@@ -1637,8 +1638,9 @@ int CPlateLocate::plateLocate(Mat src, vector<Mat>& resultVec, int index)
 		//large the rect for more
 		if (!verifySizes(mr))
 		{
-			cv::Mat& roi = dst_yellow(safeBoundRect);
+			cv::Mat roi = dst_yellow(safeBoundRect);
 			roi.setTo(0);
+            cv::swap(roi, dst_yellow);
 		}
 		else
 		{