diff --git a/modules/calib3d/src/rhorefc.h b/modules/calib3d/src/rhorefc.h
index 9fcb3677bc..8ebc277ad7 100644
--- a/modules/calib3d/src/rhorefc.h
+++ b/modules/calib3d/src/rhorefc.h
@@ -44,8 +44,8 @@
  */
 
 /* Include Guards */
-#ifndef __RHOREFC_H__
-#define __RHOREFC_H__
+#ifndef __OPENCV_RHOREFC_H__
+#define __OPENCV_RHOREFC_H__