diff --git a/pkg/dist/integration_endpoint_types.yml b/pkg/dist/integration_endpoint_types.yml
index 0ab1553..126dc58 100644
--- a/pkg/dist/integration_endpoint_types.yml
+++ b/pkg/dist/integration_endpoint_types.yml
@@ -503,6 +503,7 @@ rsyslog:
       type: string
       min_length: 1
       max_length: 512
+      pattern: ^[ -~\t]+$
       example: <%pri%>%timestamp:::date-rfc3339% %HOSTNAME% %app-name% %msg%
     port:
       title: rsyslog server port