diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index caac2e8..695426a 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -1996,6 +1996,9 @@
         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();
     }