diff --git a/lib/core/icingaagent/installer/Install-IcingaAgent.psm1 b/lib/core/icingaagent/installer/Install-IcingaAgent.psm1
index 44eac5f..cd5d004 100644
--- a/lib/core/icingaagent/installer/Install-IcingaAgent.psm1
+++ b/lib/core/icingaagent/installer/Install-IcingaAgent.psm1
@@ -12,6 +12,11 @@ function Install-IcingaAgent()
     $IcingaInstaller  = Get-IcingaAgentMSIPackage -Source $Source -Version $Version -SkipDownload;
     $InstallTarget    = $IcingaData.RootDir;
 
+    if ([string]::IsNullOrEmpty($Version)) {
+        Write-Host 'No Icinga Agent version specified. Skipping installation.';
+        return $FALSE;
+    }
+
     if ($IcingaData.Installed -eq $TRUE -and $AllowUpdates -eq $FALSE) {
         Write-Host 'The Icinga Agent is already installed on this system. To perform updates or downgrades, please add the "-AllowUpdates" argument';
         return $FALSE;