diff --git a/lib/vagrant-lxc/action/clear_forwarded_ports.rb b/lib/vagrant-lxc/action/clear_forwarded_ports.rb
index 44c0586..8f66963 100644
--- a/lib/vagrant-lxc/action/clear_forwarded_ports.rb
+++ b/lib/vagrant-lxc/action/clear_forwarded_ports.rb
@@ -15,7 +15,7 @@ module Vagrant
             redir_pids.each do |pid|
               next unless is_redir_pid?(pid)
               @logger.debug "Killing pid #{pid}"
-              system "sudo pkill -9 -P #{pid}"
+              system "sudo pkill -TERM -P #{pid}"
             end
 
             remove_redir_pids
diff --git a/spec/unit/action/clear_forwarded_ports_spec.rb b/spec/unit/action/clear_forwarded_ports_spec.rb
index 4dcc997..c111032 100644
--- a/spec/unit/action/clear_forwarded_ports_spec.rb
+++ b/spec/unit/action/clear_forwarded_ports_spec.rb
@@ -28,15 +28,15 @@ describe Vagrant::LXC::Action::ClearForwardedPorts do
 
   context 'with a valid redir pid' do
     it 'kills known processes' do
-      subject.should have_received(:system).with("sudo pkill -9 -P #{pid}")
+      subject.should have_received(:system).with("sudo pkill -TERM -P #{pid}")
     end
   end
 
   context 'with an invalid pid' do
-    let(:pid_cmd)   { 'sudo ls' }
+    let(:pid_cmd) { 'sudo ls' }
 
     it 'does not kill the process' do
-      subject.should_not have_received(:system).with("sudo pkill -9 -P #{pid}")
+      subject.should_not have_received(:system).with("sudo pkill -TERM -P #{pid}")
     end
   end
 end