diff --git a/doc/py_tutorials/py_setup/py_setup_in_windows/py_setup_in_windows.markdown b/doc/py_tutorials/py_setup/py_setup_in_windows/py_setup_in_windows.markdown
index 0ba1643ee1..1cefb01d5c 100644
--- a/doc/py_tutorials/py_setup/py_setup_in_windows/py_setup_in_windows.markdown
+++ b/doc/py_tutorials/py_setup/py_setup_in_windows/py_setup_in_windows.markdown
@@ -33,6 +33,8 @@ Installing OpenCV from prebuilt binaries
 
 -#  Copy **cv2.pyd** to **C:/Python27/lib/site-packages**.
 
+-#  Copy the **opencv_world.dll** file to **C:/Python27/lib/site-packages**
+
 -#  Open Python IDLE and type following codes in Python terminal.
     @code
         >>> import cv2 as cv