diff --git a/library/src/main/java/com/bumptech/glide/manager/ActivityFragmentLifecycle.java b/library/src/main/java/com/bumptech/glide/manager/ActivityFragmentLifecycle.java
index 940438f0e8f2e65659e10cdf1cc9791fd796a345..aaf01e50e309139aa90a5e6d3ed6ea552d0b2bd7 100644
--- a/library/src/main/java/com/bumptech/glide/manager/ActivityFragmentLifecycle.java
+++ b/library/src/main/java/com/bumptech/glide/manager/ActivityFragmentLifecycle.java
@@ -12,7 +12,7 @@ import java.util.WeakHashMap;
  */
 class ActivityFragmentLifecycle implements Lifecycle {
     private final Set<LifecycleListener> lifecycleListeners =
-            Collections.synchronizedSet(Collections.newSetFromMap(new WeakHashMap<LifecycleListener, Boolean>()));
+            Collections.newSetFromMap(new WeakHashMap<LifecycleListener, Boolean>());
     private boolean isStarted;
     private boolean isDestroyed;