diff --git a/Install-AteraAgent.ps1 b/Install-AteraAgent.ps1
index 43a05ad..024b384 100644
--- a/Install-AteraAgent.ps1
+++ b/Install-AteraAgent.ps1
@@ -6,7 +6,7 @@
 )
 
 # Make sure $INTEGRATOR_ID exists, otherwise exit this script as an agent cannot be downloaded
-If ( -not ($INTEGRATOR_ID) ) { Exit }
+If ( ($INTEGRATOR_ID -eq $null) -or ($INTEGRATOR_ID -eq '') ) { Exit }
 
 # Source the Tools.ps1 script
 Function SourceTools