diff --git a/.appveyor.yml b/.appveyor.yml
index ed282cf..47caefc 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -78,7 +78,7 @@ install:
   - "%CMD_IN_ENV% pip install -r requirements-dev.txt"
   - "cd core"
   - ps: "ls dist"
-  - "%CMD_IN_ENV% call .\make.bat"
+  - "%CMD_IN_ENV% call .\\make.bat"
   - "cd .."
 
 build_script: