diff --git a/.ssh/config b/.ssh/config
index ae3403e..b637ad6 100644
--- a/.ssh/config
+++ b/.ssh/config
@@ -22,9 +22,10 @@ Host leela leela.open-source.co.uk
 Host *
   # AddKeysToAgent		yes
   ConnectTimeout		30
-  ControlMaster			auto
-  ControlPath			~/.ssh/%u@%l->%r@%h:%p
-  ControlPersist		7200
+# Removed as this prevents use of ^Z suspension.
+# ControlMaster			auto
+# ControlPath			~/.ssh/%u@%l->%r@%h:%p
+# ControlPersist		7200
   ExitOnForwardFailure		yes
   ForwardX11Trusted		no
   SendEnv			LANG LC_* TERM