diff --git a/Assets/Mirror/Editor/NetworkIdentityEditor.cs b/Assets/Mirror/Editor/NetworkIdentityEditor.cs
index b900e34ee..af250af40 100644
--- a/Assets/Mirror/Editor/NetworkIdentityEditor.cs
+++ b/Assets/Mirror/Editor/NetworkIdentityEditor.cs
@@ -92,14 +92,8 @@ public override void OnInspectorGUI()
                 }
             }
 
-#if UNITY_2018_3_OR_NEWER
             if (PrefabUtility.IsPartOfPrefabAsset(m_NetworkIdentity.gameObject))
                 return;
-#else
-            PrefabType prefabType = PrefabUtility.GetPrefabType(m_NetworkIdentity.gameObject);
-            if (prefabType == PrefabType.Prefab)
-                return;
-#endif
 
             if (m_NetworkIdentity.gameObject.activeSelf && m_NetworkIdentity.netId == 0 && NetworkServer.active)
             {