diff --git a/azure-pipelines/darwin-install-ninja.yml b/azure-pipelines/darwin-install-ninja.yml
index 9d538a57..47030170 100644
--- a/azure-pipelines/darwin-install-ninja.yml
+++ b/azure-pipelines/darwin-install-ninja.yml
@@ -7,6 +7,7 @@ steps:
     pushd /opt/ninja
     sudo wget https://github.com/ninja-build/ninja/releases/download/v1.9.0/ninja-mac.zip
     sudo unzip ninja-mac.zip
+    sudo chmod a+rx ninja
     popd
     echo '##vso[task.prependpath]/opt/ninja'
   displayName: 'Install Ninja'