diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index dccc145..0bd2b92 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -186,7 +186,7 @@ def cmd_msbuild(
         "license": "LICENSE",
         "build": [
             cmd_mkdir(r"ext\rav1e\rav1e\build.libavif"),
-            cmd_xcopy(r"..\rav1e-windows-msvc-sdk", r"rav1e\rav1e\build.libavif\usr"),
+            cmd_xcopy(r"..\rav1e-windows-msvc-sdk", r"ext\rav1e\rav1e\build.libavif\usr"),
             cmd_cd("ext"),
             # cmd_rmdir("aom"),
             # 'cmd.exe /c "aom.cmd"',