diff --git a/core/java/android/content/pm/PackageManager.java b/core/java/android/content/pm/PackageManager.java
index 5cbd18538fd13..35db667922cae 100644
--- a/core/java/android/content/pm/PackageManager.java
+++ b/core/java/android/content/pm/PackageManager.java
@@ -5132,6 +5132,7 @@ public abstract class PackageManager {
      * @param packageName The name of the package to query
      * @throws IllegalArgumentException if the given package name is not installed
      */
+    @Nullable
     public abstract String getInstallerPackageName(String packageName);
 
     /**