diff --git a/modules/core/include/opencv2/core/mat.inl.hpp b/modules/core/include/opencv2/core/mat.inl.hpp
index 178db1b882..31638afd01 100644
--- a/modules/core/include/opencv2/core/mat.inl.hpp
+++ b/modules/core/include/opencv2/core/mat.inl.hpp
@@ -689,6 +689,16 @@ void Mat::release()
     datastart = dataend = datalimit = data = 0;
     for(int i = 0; i < dims; i++)
         size.p[i] = 0;
+#ifdef _DEBUG
+    flags = MAGIC_VAL;
+    dims = rows = cols = 0;
+    if(step.p != step.buf)
+    {
+        fastFree(step.p);
+        step.p = step.buf;
+        size.p = &rows;
+    }
+#endif
 }
 
 inline