diff --git a/modules/DisparityStereoSGBM.h b/modules/DisparityStereoSGBM.h
index fae9c66..cdd5142 100644
--- a/modules/DisparityStereoSGBM.h
+++ b/modules/DisparityStereoSGBM.h
@@ -58,7 +58,7 @@ private:
 #if( CV_MAJOR_VERSION == 3)
   cv::Ptr<cv::StereoSGBM> m_cStereoMatch;
 #else
-  StereoSGBM m_cStereoMatch;
+  cv::StereoSGBM m_cStereoMatch;
 #endif
 
 public: