diff --git a/rabbitmq/templates/monitoring/prometheus/exporter-deployment.yaml b/rabbitmq/templates/monitoring/prometheus/exporter-deployment.yaml
index ab58c3259..e32a2f0f1 100644
--- a/rabbitmq/templates/monitoring/prometheus/exporter-deployment.yaml
+++ b/rabbitmq/templates/monitoring/prometheus/exporter-deployment.yaml
@@ -63,7 +63,7 @@ spec:
           - name: RABBIT_CAPABILITIES
             value: {{ include "helm-toolkit.utils.joinListWithComma" $envAll.Values.conf.prometheus_exporter.capabilities | quote }}
           - name: PUBLISH_PORT
-            value: {{ tuple "prometheus_rabbitmq_exporter" "internal" "metrics" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
+            value: {{ tuple "prometheus_rabbitmq_exporter" "internal" "metrics" . | include "helm-toolkit.endpoints.endpoint_port_lookup" | quote }}
           - name: LOG_LEVEL
             value: {{ $envAll.Values.conf.prometheus_exporter.log_level | quote }}
           - name: SKIPVERIFY