diff --git a/smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java b/smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java
index 73486cd12..04e2dd8e9 100644
--- a/smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java
+++ b/smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java
@@ -1620,7 +1620,7 @@ public final class Roster extends Manager {
         @Override
         public void onSuccess(IQ packet) {
             final XMPPConnection connection = connection();
-            LOGGER.log(Level.FINE, "RosterResultListener received {}", packet);
+            LOGGER.log(Level.FINE, "RosterResultListener received {0}", packet);
             Collection<Jid> addedEntries = new ArrayList<>();
             Collection<Jid> updatedEntries = new ArrayList<>();
             Collection<Jid> deletedEntries = new ArrayList<>();