diff --git a/smack-experimental/src/main/java/org/jivesoftware/smackx/carbons/CarbonManager.java b/smack-experimental/src/main/java/org/jivesoftware/smackx/carbons/CarbonManager.java
index 196484c97..f5b231d1e 100644
--- a/smack-experimental/src/main/java/org/jivesoftware/smackx/carbons/CarbonManager.java
+++ b/smack-experimental/src/main/java/org/jivesoftware/smackx/carbons/CarbonManager.java
@@ -154,8 +154,7 @@ public final class CarbonManager extends Manager {
                 // because we also reset in authenticated() if the stream got not resumed, but for maximum correctness,
                 // also reset here.
                 enabled_state = false;
-                boolean removed = connection().removeSyncStanzaListener(carbonsListener);
-                assert removed;
+                connection().removeSyncStanzaListener(carbonsListener);
             }
             @Override
             public void authenticated(XMPPConnection connection, boolean resumed) {