diff --git a/CHANGELOG.md b/CHANGELOG.md
index 941045aef..a545f335c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,11 +17,13 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
 -   Moved wheel import in setup.py inside of a try/except to prevent pip collection failures
 -   Removes PyLong_GetMax and PyClass_New when targetting Python3
 -   Added support for converting python iterators to C# arrays
+-   Changed usage of obselete function GetDelegateForFunctionPointer(IntPtr, Type) to GetDelegateForFunctionPointer<TDelegate>(IntPtr)
 
 ### Fixed
 
 - Fixed runtime that fails loading when using pythonnet in an environment
   together with Nuitka
+- Fixes bug where delegates get casts (dotnetcore)
 
 ## [2.4.0][]
 
diff --git a/src/runtime/nativecall.cs b/src/runtime/nativecall.cs
index b5bf25dd7..4a7bf05c8 100644
--- a/src/runtime/nativecall.cs
+++ b/src/runtime/nativecall.cs
@@ -32,19 +32,21 @@ internal class NativeCall
 
         public static void Void_Call_1(IntPtr fp, IntPtr a1)
         {
-            ((Void_1_Delegate)Marshal.GetDelegateForFunctionPointer(fp, typeof(Void_1_Delegate)))(a1);
+            var d = Marshal.GetDelegateForFunctionPointer<Interop.DestructorFunc>(fp);
+            d(a1);
         }
 
         public static IntPtr Call_3(IntPtr fp, IntPtr a1, IntPtr a2, IntPtr a3)
         {
-            var d = (Interop.TernaryFunc)Marshal.GetDelegateForFunctionPointer(fp, typeof(Interop.TernaryFunc));
+            var d = Marshal.GetDelegateForFunctionPointer<Interop.TernaryFunc>(fp);
             return d(a1, a2, a3);
         }
 
 
         public static int Int_Call_3(IntPtr fp, IntPtr a1, IntPtr a2, IntPtr a3)
         {
-            return ((Int_3_Delegate)Marshal.GetDelegateForFunctionPointer(fp, typeof(Int_3_Delegate)))(a1, a2, a3);
+            var d = Marshal.GetDelegateForFunctionPointer<Interop.ObjObjArgFunc>(fp);
+            return d(a1, a2, a3);
         }
 #else
         private static AssemblyBuilder aBuilder;