diff --git a/proxy/http/HttpTunnel.cc b/proxy/http/HttpTunnel.cc
index e87cad1c62a..6cff702b412 100644
--- a/proxy/http/HttpTunnel.cc
+++ b/proxy/http/HttpTunnel.cc
@@ -477,6 +477,7 @@ HttpTunnel::reset()
   }
 #endif
 
+  call_sm       = false;
   num_producers = 0;
   num_consumers = 0;
   ink_zero(consumers);