diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index 74be7ce..0727b88 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -2207,6 +2207,9 @@
         auto obbPath = StringPrintf("%s/Android/obb",
                 create_data_media_path(uuid_, userId).c_str());
         calculate_tree_size(obbPath, &obbSize);
+        if (!(flags & FLAG_USE_QUOTA)) {
+            totalSize -= obbSize;
+        }
         ATRACE_END();
     }