diff --git a/core/java/com/android/internal/app/procstats/ProcessState.java b/core/java/com/android/internal/app/procstats/ProcessState.java
index 87e8ac1be611a..72b9cd272d026 100644
--- a/core/java/com/android/internal/app/procstats/ProcessState.java
+++ b/core/java/com/android/internal/app/procstats/ProcessState.java
@@ -473,7 +473,10 @@ public final class ProcessState {
                 }
             }
             mCurCombinedState = state;
-            mStats.mUidStates.get(mUid).updateCombinedState(state, now);
+            final UidState uidState = mStats.mUidStates.get(mUid);
+            if (uidState != null) {
+                uidState.updateCombinedState(state, now);
+            }
         }
     }