diff --git a/services/backup/java/com/android/server/backup/BackupManagerService.java b/services/backup/java/com/android/server/backup/BackupManagerService.java
index 6c2681b2112a7..6b8b5b10acff7 100644
--- a/services/backup/java/com/android/server/backup/BackupManagerService.java
+++ b/services/backup/java/com/android/server/backup/BackupManagerService.java
@@ -7664,7 +7664,7 @@ if (MORE_DEBUG) Slog.v(TAG, "   + got " + nRead + "; now wanting " + (size - soF
 
             // If this was a full-system restore, record the ancestral
             // dataset information
-            if (mIsSystemRestore) {
+            if (mIsSystemRestore && mPmAgent != null) {
                 mAncestralPackages = mPmAgent.getRestoredPackages();
                 mAncestralToken = mToken;
                 writeRestoreTokens();