diff --git a/src/Region.cpp b/src/Region.cpp
index 42450f2..8a4a2fa 100644
--- a/src/Region.cpp
+++ b/src/Region.cpp
@@ -3,7 +3,7 @@
 #ifdef OPENCV
     #include <opencv2/core/core.hpp>
     #include <opencv2/highgui/highgui.hpp>
-    #include <opencv2/imgproc.hpp>
+    #include <opencv2/imgproc/imgproc.hpp>
 #endif
 
 #include "Layer.h"