diff --git a/Editor/SetupOutfit.cs b/Editor/SetupOutfit.cs
index f6d28c53..6c263c89 100644
--- a/Editor/SetupOutfit.cs
+++ b/Editor/SetupOutfit.cs
@@ -386,6 +386,14 @@ namespace nadena.dev.modular_avatar.core.editor
         private static bool ValidateSetupOutfit(GameObject gameObj)
         {
             Object obj;
+
+            if (gameObj == null)
+            {
+                errorHeader = S("setup_outfit.err.header.notarget");
+                errorMessageGroups = new string[] { S("setup_outfit.err.no_selection") };
+                return false;
+            }
+
             errorHeader = S_f("setup_outfit.err.header", gameObj.name);
             var xform = gameObj.transform;
 
@@ -542,4 +550,4 @@ namespace nadena.dev.modular_avatar.core.editor
             return avatarHips != null && outfitHips != null;
         }
     }
-}
\ No newline at end of file
+}