diff --git a/src/main/java/org/apache/sling/servlets/get/impl/helpers/JsonRenderer.java b/src/main/java/org/apache/sling/servlets/get/impl/helpers/JsonRenderer.java
index 2fff1b8..975f520 100644
--- a/src/main/java/org/apache/sling/servlets/get/impl/helpers/JsonRenderer.java
+++ b/src/main/java/org/apache/sling/servlets/get/impl/helpers/JsonRenderer.java
@@ -204,7 +204,7 @@
      * @throws SlingException wrapping the given exception
      */
     private void reportException(Exception e) {
-        log.warn("Error in JsonRendererServlet: " + e.toString(), e);
+        log.warn("Error in JsonRendererServlet: {}", e);
         throw new SlingException(e.toString(), e);
     }
 }