diff --git a/CI/before_script.msvc.sh b/CI/before_script.msvc.sh
index a7df33b23a..3d6c961749 100644
--- a/CI/before_script.msvc.sh
+++ b/CI/before_script.msvc.sh
@@ -4,6 +4,7 @@ set -euo pipefail
 
 APPVEYOR=${APPVEYOR:-}
 CI=${CI:-}
+STEP=${STEP:-}
 
 VERBOSE=""
 STRIP=""