diff --git a/OSC/Source/OSC/OSC.Build.cs b/OSC/Source/OSC/OSC.Build.cs
index ca6a212..30a71e6 100644
--- a/OSC/Source/OSC/OSC.Build.cs
+++ b/OSC/Source/OSC/OSC.Build.cs
@@ -38,7 +38,7 @@ namespace UnrealBuildTool.Rules
 				}
 			);
 
-            if (Target.Type.HasValue && TargetRules.IsEditorType(Target.Type.Value))
+            if (Target.Type.HasValue && Target.Type.Value == TargetRules.TargetType.Editor)
             {
                 Definitions.Add("OSC_EDITOR_BUILD=1");