diff --git a/charts/cups-airprint/templates/deployment.yaml b/charts/cups-airprint/templates/deployment.yaml
index 8607201..393a256 100644
--- a/charts/cups-airprint/templates/deployment.yaml
+++ b/charts/cups-airprint/templates/deployment.yaml
@@ -51,7 +51,7 @@ spec:
             - name: config
               mountPath: /config
             - name: spool
-              mountPath: /var/spool/cups-pdf
+              mountPath: "/var/spool/cups-pdf"
             - name: avahi
               mountPath: /services
       volumes: