diff --git a/manifests/manage_site.pp b/manifests/manage_site.pp
index 0e436e7..c54d1ec 100644
--- a/manifests/manage_site.pp
+++ b/manifests/manage_site.pp
@@ -17,7 +17,7 @@
 
     $switches = join($createSwitches,' ')
     exec { "CreateSite-${site_name}" :
-      command   => "${iis::param::powershell::command} -Command \"Import-Module WebAdministration; New-WebSite ${switches} \"",
+      command   => "${iis::param::powershell::command} -Command \"Import-Module WebAdministration; \$id = (Get-WebSite | foreach {\$_.id} | sort -Descending | select -first 1) + 1; New-WebSite ${switches} -ID \$id \"",
       path      => "${iis::param::powershell::path};${::path}",
       onlyif    => "${iis::param::powershell::command} -Command \"Import-Module WebAdministration; if((Test-Path \\\"IIS:\\Sites\\${site_name}\\\")) { exit 1 } else { exit 0 }\"",
       logoutput => true,
diff --git a/spec/defines/manage_site_spec.rb b/spec/defines/manage_site_spec.rb
index 2e876e6..6730595 100644
--- a/spec/defines/manage_site_spec.rb
+++ b/spec/defines/manage_site_spec.rb
@@ -14,7 +14,7 @@
     it { should include_class('iis::param::powershell') }
 
     it { should contain_exec('CreateSite-myWebSite').with({
-      'command' => "#{powershell} -Command \"Import-Module WebAdministration; New-WebSite -Name \\\"myWebSite\\\" -Port 80 -IP * -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\myWebSite\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false \"",
+      'command' => "#{powershell} -Command \"Import-Module WebAdministration; $id = (Get-WebSite | foreach {$_.id} | sort -Descending | select -first 1) + 1; New-WebSite -Name \\\"myWebSite\\\" -Port 80 -IP * -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\myWebSite\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false -ID $id \"",
       'onlyif'  => "#{powershell} -Command \"Import-Module WebAdministration; if((Test-Path \\\"IIS:\\Sites\\myWebSite\\\")) { exit 1 } else { exit 0 }\"",
     })}
   end
@@ -33,7 +33,7 @@
     it { should include_class('iis::param::powershell') }
 
     it { should contain_exec('CreateSite-myWebSite').with({
-      'command' => "#{powershell} -Command \"Import-Module WebAdministration; New-WebSite -Name \\\"myWebSite\\\" -Port 1080 -IP 127.0.0.1 -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\path\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false \"",
+      'command' => "#{powershell} -Command \"Import-Module WebAdministration; $id = (Get-WebSite | foreach {$_.id} | sort -Descending | select -first 1) + 1; New-WebSite -Name \\\"myWebSite\\\" -Port 1080 -IP 127.0.0.1 -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\path\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false -ID $id \"",
       'onlyif'  => "#{powershell} -Command \"Import-Module WebAdministration; if((Test-Path \\\"IIS:\\Sites\\myWebSite\\\")) { exit 1 } else { exit 0 }\"",
     })}
   end
@@ -48,7 +48,7 @@
     } }
 
     it { should contain_exec('CreateSite-myWebSite').with({
-      'command' => "#{powershell} -Command \"Import-Module WebAdministration; New-WebSite -Name \\\"myWebSite\\\" -Port 80 -IP * -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\myWebSite\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false \"",
+      'command' => "#{powershell} -Command \"Import-Module WebAdministration; $id = (Get-WebSite | foreach {$_.id} | sort -Descending | select -first 1) + 1; New-WebSite -Name \\\"myWebSite\\\" -Port 80 -IP * -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\myWebSite\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false -ID $id \"",
       'onlyif'  => "#{powershell} -Command \"Import-Module WebAdministration; if((Test-Path \\\"IIS:\\Sites\\myWebSite\\\")) { exit 1 } else { exit 0 }\"",
     })}
   end
@@ -63,7 +63,7 @@
     } }
 
     it { should contain_exec('CreateSite-myWebSite').with({
-      'command' => "#{powershell} -Command \"Import-Module WebAdministration; New-WebSite -Name \\\"myWebSite\\\" -Port 80 -IP * -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\myWebSite\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false \"",
+      'command' => "#{powershell} -Command \"Import-Module WebAdministration; $id = (Get-WebSite | foreach {$_.id} | sort -Descending | select -first 1) + 1; New-WebSite -Name \\\"myWebSite\\\" -Port 80 -IP * -HostHeader \\\"myHost.example.com\\\" -PhysicalPath \\\"C:\\inetpub\\wwwroot\\myWebSite\\\" -ApplicationPool \\\"myAppPool.example.com\\\" -Ssl:$false -ID $id \"",
       'onlyif'  => "#{powershell} -Command \"Import-Module WebAdministration; if((Test-Path \\\"IIS:\\Sites\\myWebSite\\\")) { exit 1 } else { exit 0 }\"",
     })}
   end
@@ -97,4 +97,4 @@
       'onlyif'  => "#{powershell} -Command \"Import-Module WebAdministration; if(!(Test-Path \\\"IIS:\\Sites\\myWebSite\\\")) { exit 1 } else { exit 0 }\"",
     })}
   end
-end
\ No newline at end of file
+end