diff --git a/services/Android.bp b/services/Android.bp
index db233e57c9445..69733c0001943 100644
--- a/services/Android.bp
+++ b/services/Android.bp
@@ -22,6 +22,7 @@ java_defaults {
             "-Xep:HashtableContains:ERROR",
             "-Xep:FormatString:ERROR",
             "-Xep:ArrayHashCode:ERROR",
+            "-Xep:SelfAssignment:ERROR",
             // NOTE: only enable to generate local patchfiles
             // "-XepPatchChecks:refaster:frameworks/base/errorprone/refaster/EfficientXml.java.refaster",
             // "-XepPatchLocation:/tmp/refaster/",
diff --git a/services/autofill/java/com/android/server/autofill/AutofillManagerService.java b/services/autofill/java/com/android/server/autofill/AutofillManagerService.java
index 051281c5dd08f..fc95cdd53f294 100644
--- a/services/autofill/java/com/android/server/autofill/AutofillManagerService.java
+++ b/services/autofill/java/com/android/server/autofill/AutofillManagerService.java
@@ -1614,8 +1614,8 @@ public final class AutofillManagerService
                 @NonNull IBinder appCallback, @NonNull IResultReceiver receiver)
                 throws RemoteException {
             final int userId = UserHandle.getCallingUserId();
-            activityToken = Objects.requireNonNull(activityToken, "activityToken");
-            appCallback = Objects.requireNonNull(appCallback, "appCallback");
+            Objects.requireNonNull(activityToken, "activityToken");
+            Objects.requireNonNull(appCallback, "appCallback");
 
             boolean restored = false;
             synchronized (mLock) {