diff --git a/lib/Xmobar/Plugins/VPN.hs b/lib/Xmobar/Plugins/VPN.hs
index a4283db..037420c 100644
--- a/lib/Xmobar/Plugins/VPN.hs
+++ b/lib/Xmobar/Plugins/VPN.hs
@@ -57,7 +57,7 @@ data VEnv c = VEnv
   , vEnv :: !SimpleApp
   }
 
-instance HasLogFunc (VEnv SysClient) where
+instance SafeClient c => HasLogFunc (VEnv c) where
   logFuncL = lens vEnv (\x y -> x {vEnv = y}) . logFuncL
 
 instance HasClient VEnv where