diff --git a/docs/src/main/asciidoc/config-extending-support.adoc b/docs/src/main/asciidoc/config-extending-support.adoc
index ae4f9035d3586..80a84b2fa5aec 100644
--- a/docs/src/main/asciidoc/config-extending-support.adoc
+++ b/docs/src/main/asciidoc/config-extending-support.adoc
@@ -368,6 +368,8 @@ The `ConfigSourceInterceptorFactory` may initialize an interceptor with access t
 ----
 package org.acme.config;
 
+import static io.smallrye.config.SecretKeys.doLocked;
+
 import jakarta.annotation.Priority;
 
 import io.smallrye.config.ConfigSourceInterceptor;