diff --git a/services/Android.bp b/services/Android.bp
index b40034abb1728..db233e57c9445 100644
--- a/services/Android.bp
+++ b/services/Android.bp
@@ -21,6 +21,7 @@ java_defaults {
             "-Xep:TryFailThrowable:ERROR",
             "-Xep:HashtableContains:ERROR",
             "-Xep:FormatString:ERROR",
+            "-Xep:ArrayHashCode:ERROR",
             // NOTE: only enable to generate local patchfiles
             // "-XepPatchChecks:refaster:frameworks/base/errorprone/refaster/EfficientXml.java.refaster",
             // "-XepPatchLocation:/tmp/refaster/",
diff --git a/services/people/java/com/android/server/people/data/EventIndex.java b/services/people/java/com/android/server/people/data/EventIndex.java
index 6a13b0e6dd6ee..02afb8d1cc183 100644
--- a/services/people/java/com/android/server/people/data/EventIndex.java
+++ b/services/people/java/com/android/server/people/data/EventIndex.java
@@ -254,7 +254,7 @@ public class EventIndex {
 
     @Override
     public int hashCode() {
-        return Objects.hash(mLastUpdatedTime, mEventBitmaps);
+        return Objects.hash(mLastUpdatedTime, Arrays.hashCode(mEventBitmaps));
     }
 
     synchronized void writeToProto(@NonNull ProtoOutputStream protoOutputStream) {