diff --git a/modules/highgui/src/cap_libv4l.cpp b/modules/highgui/src/cap_libv4l.cpp
index 63a2ff96b0..ec048aff77 100644
--- a/modules/highgui/src/cap_libv4l.cpp
+++ b/modules/highgui/src/cap_libv4l.cpp
@@ -1714,6 +1714,7 @@ static void icvCloseCAM_V4L( CvCaptureCAM_V4L* capture ){
 #endif
 
      free(capture->deviceName);
+     capture->deviceName = NULL;
      //v4l2_free_ranges(capture);
      //cvFree((void **)capture);
    }