diff --git a/doc/build.md b/doc/build.md
index 26ba2991b1272e322da83c24a07b06a321900c7b..f8fd065419a94b7ece8893bb0ac184c1dcf5abb9 100644
--- a/doc/build.md
+++ b/doc/build.md
@@ -34,7 +34,7 @@ Integration consists of the following steps:
 1. Download OpenCV sources:
 ```
 wget https://github.com/opencv/opencv/archive/refs/tags/4.9.0.tar.gz
-tar xf 4.9.0
+tar xf 4.9.0.tar.gz
 cd opencv-4.9.0
 ```
 2. Patch OpenCV: