diff --git a/appveyor.yml b/appveyor.yml
index 295fcd9..12ad326 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -30,7 +30,7 @@ install:
   - git submodule update --init tools/build
   - git submodule update --init libs/config
   - git submodule update --init tools/boostdep
-  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\mp11
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\mp11\
   - python tools/boostdep/depinst/depinst.py mp11
   - cmd /c bootstrap
   - b2 headers