diff --git a/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs b/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs
index be25cc6..e96a397 100644
--- a/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs
+++ b/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs
@@ -328,7 +328,7 @@ namespace Bloxstrap.UI.Elements.Editor
 
         private void OpenTypeValueAutoComplete(string typeName)
         {
-            if (CustomBootstrapperSchema.Types.ContainsKey(typeName))
+            if (!CustomBootstrapperSchema.Types.ContainsKey(typeName))
                 throw new Exception($"Schema for type {typeName} is missing. Blame Matt!");
 
             var typeValues = CustomBootstrapperSchema.Types[typeName].Values;