diff --git a/core/java/android/app/AlarmManager.java b/core/java/android/app/AlarmManager.java
index cb2130c4528ee..e4fff9dc8a8c1 100644
--- a/core/java/android/app/AlarmManager.java
+++ b/core/java/android/app/AlarmManager.java
@@ -905,10 +905,12 @@ public class AlarmManager {
 
         ListenerWrapper wrapper = null;
         synchronized (AlarmManager.class) {
-            final WeakReference<ListenerWrapper> wrapperRef;
-            wrapperRef = sWrappers.get(listener);
-            if (wrapperRef != null) {
-                wrapper = wrapperRef.get();
+            if (sWrappers != null) {
+                final WeakReference<ListenerWrapper> wrapperRef;
+                wrapperRef = sWrappers.get(listener);
+                if (wrapperRef != null) {
+                    wrapper = wrapperRef.get();
+                }
             }
         }