diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index 827dfc0caa16a..1a0a885d88b4c 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -21918,7 +21918,7 @@ public class PackageManagerService extends IPackageManager.Stub
         for (int i = 0, size = SYSTEM_PARTITIONS.size(); i < size; i++) {
             ScanPartition sp = SYSTEM_PARTITIONS.get(i);
             if (apexInfo.preInstalledApexPath.getAbsolutePath().startsWith(
-                    sp.getFolder().getAbsolutePath())) {
+                    sp.getFolder().getAbsolutePath() + File.separator)) {
                 return new ScanPartition(apexInfo.apexDirectory, sp, SCAN_AS_APK_IN_APEX);
             }
         }