diff --git a/appveyor.yml b/appveyor.yml
index b0c3128..ad1f580 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,7 +6,7 @@ before_build:
         cp ..\travis-tool.sh R\travis-tool.sh
         cp travis-tool.sh.cmd R\travis-tool.sh.cmd
         cd R
-        bash -c "echo '^travis-tool\.sh\.cmd$' >> .Rbuildignore"
+        bash -c "echo '^travis-tool\.sh(\.cmd)?$' >> .Rbuildignore"
 
 # Download script file from GitHub
 init: