diff --git a/doc/dnssec-guide/signing.rst b/doc/dnssec-guide/signing.rst
index ea920801b5..6aa3617264 100644
--- a/doc/dnssec-guide/signing.rst
+++ b/doc/dnssec-guide/signing.rst
@@ -898,7 +898,7 @@ presence. Let's look at the following configuration excerpt:
 ::
 
    parental-agents "net" {
-       10.53.0.11, 10.53.0.12;
+       10.53.0.11; 10.53.0.12;
    };
 
    zone "example.net" in {