diff --git a/CLre/API/Engines/FrontEndEngines.cs b/CLre/API/Engines/FrontEndEngines.cs
index c3f9305..62b8cf7 100644
--- a/CLre/API/Engines/FrontEndEngines.cs
+++ b/CLre/API/Engines/FrontEndEngines.cs
@@ -1,3 +1,4 @@
+using System.Reflection;
 using HarmonyLib;
 using Svelto.DataStructures;
 using Svelto.ECS;
@@ -89,6 +90,8 @@ namespace CLre.API.Engines
         
         internal static FasterList<FrontEndEnginePostBuild> afterBuildEngines = new FasterList<FrontEndEnginePostBuild>();
         
+        internal static MethodInfo addEngine = AccessTools.Method(typeof(FrontEnd.MainFrontEnd), "AddEngine");
+        
         [HarmonyPrefix]
         public static void BeforeMethodCall(FrontEnd.MainFrontEnd __instance)
         {
@@ -96,7 +99,7 @@ namespace CLre.API.Engines
             foreach (ICLreEngine e in beforeBuildEngines)
             {
                 e.entityFactory = factory;
-                __instance.AddEngine(e);
+                addEngine.Invoke(__instance, new object[] {e}); // __instance.AddEngine(e);
             }
         }
         
@@ -107,7 +110,7 @@ namespace CLre.API.Engines
             foreach (ICLreEngine e in afterBuildEngines)
             {
                 e.entityFactory = factory;
-                __instance.AddEngine(e);
+                addEngine.Invoke(__instance, new object[] {e}); // __instance.AddEngine(e);
             }
         }
     }
@@ -119,6 +122,8 @@ namespace CLre.API.Engines
         
         internal static FasterList<FrontEndObsoleteEnginePostBuild> afterBuildEngines = new FasterList<FrontEndObsoleteEnginePostBuild>();
         
+        internal static MethodInfo addEngine = AccessTools.Method(typeof(FrontEnd.MainFrontEnd), "AddEngine");
+        
         [HarmonyPrefix]
         public static void BeforeMethodCall(FrontEnd.MainFrontEnd __instance)
         {
@@ -126,7 +131,7 @@ namespace CLre.API.Engines
             foreach (ICLreEngine e in beforeBuildEngines)
             {
                 e.entityFactory = factory;
-                __instance.AddEngine(e);
+                addEngine.Invoke(__instance, new object[] {e}); // __instance.AddEngine(e);
             }
         }
         
@@ -137,7 +142,7 @@ namespace CLre.API.Engines
             foreach (ICLreEngine e in afterBuildEngines)
             {
                 e.entityFactory = factory;
-                __instance.AddEngine(e);
+                addEngine.Invoke(__instance, new object[] {e}); // __instance.AddEngine(e);
             }
         }
     }