diff --git a/cccli/commands/vnc.py b/cccli/commands/vnc.py
index 0f9fc13d079e38220b94887384c87f58131cd2b6..29f0a736f08aeddc899c8233b7cf2a8498798a7d 100644
--- a/cccli/commands/vnc.py
+++ b/cccli/commands/vnc.py
@@ -54,6 +54,7 @@ class VNCViewer(threading.Thread):
         proc = subprocess.Popen("%s '%s::%s'" % (self.viewer,
                                                  fwd.source_ip,
                                                  fwd.source_port),
+                                preexec_fn=os.setpgrp,
                                 shell=True, close_fds=True,
                                 stdin=onull, stdout=onull, stderr=onull)
         proc.wait()