diff --git a/panda/src/event/asyncTask.I b/panda/src/event/asyncTask.I
index 38e80a4f14..50e88e5f9a 100644
--- a/panda/src/event/asyncTask.I
+++ b/panda/src/event/asyncTask.I
@@ -46,6 +46,9 @@ is_alive() const {
   case S_servicing_removed:
     return false;
   }
+
+  // Shouldn't get here.
+  return false;
 }
 
 ////////////////////////////////////////////////////////////////////