diff --git a/src/main/java/com/semanticcms/core/sitemap/SiteMapIndexServlet.java b/src/main/java/com/semanticcms/core/sitemap/SiteMapIndexServlet.java
index ca8487e..64b1f0c 100644
--- a/src/main/java/com/semanticcms/core/sitemap/SiteMapIndexServlet.java
+++ b/src/main/java/com/semanticcms/core/sitemap/SiteMapIndexServlet.java
@@ -178,8 +178,8 @@ public void contextInitialized(ServletContextEvent event) {
               }
             }
           }
-          logger.info("Found sitemap index at " + url + " containing " + count + " "
-              + (count == 1 ? "sitemap" : "sitemaps"));
+          logger.log(Level.INFO, "Found sitemap index at {0} containing {1} {2}",
+              new Object[]{url, count, count == 1 ? "sitemap" : "sitemaps"});
         }
         JAR_SITEMAP_INDEXES.context(event.getServletContext()).set(jarSitemapIndexes);
       } catch (IOException e) {