diff --git a/tools/windows/tool_setup/build_installer.sh b/tools/windows/tool_setup/build_installer.sh
index d5b9b0d33b..6c30f09785 100755
--- a/tools/windows/tool_setup/build_installer.sh
+++ b/tools/windows/tool_setup/build_installer.sh
@@ -10,10 +10,7 @@
 set -e
 set -u
 
-INSTALLER_TYPE="$1"
-if [[ -z "$INSTALLER_TYPE" ]]; then
-    INSTALLER_TYPE="full"
-fi
+INSTALLER_TYPE="${1-full}"
 
 echo "Selected installer type: $INSTALLER_TYPE"
 echo "Available installer types: full, netinst"