diff --git a/tcl/drivers/dil12.tcl b/tcl/drivers/dil12.tcl
index 905d72f..db7074d 100644
--- a/tcl/drivers/dil12.tcl
+++ b/tcl/drivers/dil12.tcl
@@ -783,7 +783,7 @@ proc dil12::autostep {phase init} {
           hset [sct] off
           return idle
       }
-      dil12::openvalves v5a v2a v7 v2 v1 v6 v13a vb_open
+      dil12::openvalves v5a v2a v7 v2 v1 v6 v13 vb_open
       dil v4a 1
       sct pumptime 0
       dil12::msg "pumping, waiting for low pressures P1 and P2"