diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index 0b615e9ea4..efbaee4ea6 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -1134,6 +1134,7 @@ public class Tethering {
         if (type == TETHERING_INVALID) {
             Log.e(TAG, "Ignoring call to legacy tether for unknown iface " + iface);
             sendTetherResult(listener, TETHER_ERROR_UNKNOWN_IFACE);
+            return;
         }
 
         TetheringRequest request = mRequestTracker.getNextPendingRequest(type);