diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 2984b42..7d26432 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -154,6 +154,7 @@
          tethering on a new interface called "foo2" add <item>"foo\\d"</item> to the array -->
     <string-array translatable="false" name="config_tether_upstream_regexs">
         <item>"rmnet\\d"</item>
+        <item>"ppp\\d"</item>
         <item>"eth\\d"</item>
     </string-array>