diff --git a/modules/video/src/bgfg_gmg.cpp b/modules/video/src/bgfg_gmg.cpp
index 448f386bf..f2e52b593 100644
--- a/modules/video/src/bgfg_gmg.cpp
+++ b/modules/video/src/bgfg_gmg.cpp
@@ -197,7 +197,7 @@ namespace
         void operator() (const cv::Range& range) const;
 
     private:
-        const cv::Mat frame_;
+        cv::Mat frame_;
 
         mutable cv::Mat_<uchar> fgmask_;