diff --git a/lib/vagrant-libvirt/action/read_ssh_info.rb b/lib/vagrant-libvirt/action/read_ssh_info.rb
index 0bee747..d7d8612 100644
--- a/lib/vagrant-libvirt/action/read_ssh_info.rb
+++ b/lib/vagrant-libvirt/action/read_ssh_info.rb
@@ -48,8 +48,8 @@ module VagrantPlugins
             :forward_agent => machine.config.ssh.forward_agent,
             :forward_x11   => machine.config.ssh.forward_x11,
           }
-          
-          ssh_info[:proxy_command] = "ssh '#{machine.provider_config.host}' -l '#{machine.provider_config.username}' nc %h %p" if machine.provider_config.connect_via_ssh
+
+          ssh_info[:proxy_command] = "ssh '#{machine.provider_config.host}' -l '#{machine.provider_config.username}' -i '#{machine.provider_config.id_ssh_key_file}' nc %h %p" if machine.provider_config.connect_via_ssh
 
           ssh_info
         end
diff --git a/lib/vagrant-libvirt/config.rb b/lib/vagrant-libvirt/config.rb
index 94cf4f3..c2543dc 100644
--- a/lib/vagrant-libvirt/config.rb
+++ b/lib/vagrant-libvirt/config.rb
@@ -248,7 +248,7 @@ module VagrantPlugins
           # set ssh key for access to libvirt host
           uri << "\&keyfile="
           # if no slash, prepend $HOME/.ssh/
-          uri << "#{`echo ${HOME}`.chomp}/.ssh/" if @id_ssh_key_file !~ /\A\//
+          @id_ssh_key_file.prepend("#{`echo ${HOME}`.chomp}/.ssh/") if @id_ssh_key_file !~ /\A\//
           uri << @id_ssh_key_file
         end
         # set path to libvirt socket