diff --git a/jspwiki-main/src/main/java/org/apache/wiki/auth/authorize/DefaultGroupManager.java b/jspwiki-main/src/main/java/org/apache/wiki/auth/authorize/DefaultGroupManager.java
index 3d6c2ed97e..fccf6c1cb0 100644
--- a/jspwiki-main/src/main/java/org/apache/wiki/auth/authorize/DefaultGroupManager.java
+++ b/jspwiki-main/src/main/java/org/apache/wiki/auth/authorize/DefaultGroupManager.java
@@ -112,7 +112,7 @@ public GroupDatabase getGroupDatabase() throws WikiSecurityException {
             if( dbClassName == null ) {
                 dbClassName = XMLGroupDatabase.class.getName();
             }
-            LOG.info( "Attempting to load group database class {}" + dbClassName );
+            LOG.info( "Attempting to load group database class {}", dbClassName );
             m_groupDatabase = ClassUtil.buildInstance( "org.apache.wiki.auth.authorize", dbClassName );
             m_groupDatabase.initialize( m_engine, m_engine.getWikiProperties() );
             LOG.info( "Group database initialized." );
diff --git a/jspwiki-util/src/main/java/org/apache/wiki/util/MailUtil.java b/jspwiki-util/src/main/java/org/apache/wiki/util/MailUtil.java
index 3a3720c541..8e8ea9ac78 100644
--- a/jspwiki-util/src/main/java/org/apache/wiki/util/MailUtil.java
+++ b/jspwiki-util/src/main/java/org/apache/wiki/util/MailUtil.java
@@ -412,7 +412,7 @@ static Session getJNDIMailSession(final String jndiName ) throws NamingException
             final Context ctx = (Context) initCtx.lookup( JAVA_COMP_ENV );
             session = (Session) ctx.lookup( jndiName );
         } catch( final NamingException e ) {
-            LOG.warn( "JNDI mail session initialization error: {}" + e.getMessage() );
+            LOG.warn( "JNDI mail session initialization error: {}", e.getMessage() );
             throw e;
         }
         LOG.debug( "mail session obtained from JNDI mail factory: {}", jndiName );