diff --git a/services/core/java/com/android/server/pm/OtaDexoptService.java b/services/core/java/com/android/server/pm/OtaDexoptService.java
index 2e4b49add05f4..271045a76a0b4 100644
--- a/services/core/java/com/android/server/pm/OtaDexoptService.java
+++ b/services/core/java/com/android/server/pm/OtaDexoptService.java
@@ -316,6 +316,7 @@ public class OtaDexoptService extends IOtaDexopt.Stub {
 
                 if (arg == null) {
                     builder.append('!');
+                    return;
                 }
 
                 String txt = String.valueOf(arg);