diff --git a/PSYaml/Public/ConvertTo-Yaml.ps1 b/PSYaml/Public/ConvertTo-Yaml.ps1
index e1fdbc7..53b8943 100644
--- a/PSYaml/Public/ConvertTo-Yaml.ps1
+++ b/PSYaml/Public/ConvertTo-Yaml.ps1
@@ -35,7 +35,7 @@ function ConvertTo-Yaml
     PROCESS
     {
         # if it is null return null
-        If ( !($inputObject) )
+        If ( $inputObject -eq $null )
         {
             
             return ''