diff --git a/ZertoApiWrapper/Public/Add-ZertoPeerSite.ps1 b/ZertoApiWrapper/Public/Add-ZertoPeerSite.ps1
index 272fb2a..8cd00d0 100644
--- a/ZertoApiWrapper/Public/Add-ZertoPeerSite.ps1
+++ b/ZertoApiWrapper/Public/Add-ZertoPeerSite.ps1
@@ -6,6 +6,7 @@ function Add-ZertoPeerSite {
             Mandatory = $true,
             HelpMessage = "Target Hostname or IP address to pair the localsite to."
         )]
+        [ValidateScript( {$_ -match [IPAddress]$_ } )]
         [string]$targetHost,
         [Parameter(
             HelpMessage = "Target communication port. Default is 9081"
@@ -27,4 +28,4 @@ function Add-ZertoPeerSite {
     end {
         # Nothing to do
     }
-}
\ No newline at end of file
+}