diff --git a/tools/dotnet-linker/Steps/ManagedRegistrarStep.cs b/tools/dotnet-linker/Steps/ManagedRegistrarStep.cs
index 9f737f9cc4ba..bd9aeeb5417e 100644
--- a/tools/dotnet-linker/Steps/ManagedRegistrarStep.cs
+++ b/tools/dotnet-linker/Steps/ManagedRegistrarStep.cs
@@ -390,7 +390,7 @@ void CreateUnmanagedCallersMethod (MethodDefinition method, AssemblyTrampolineIn
 			}
 
 			var callback = callbackType.AddMethod (name, MethodAttributes.Public | MethodAttributes.Static | MethodAttributes.HideBySig, placeholderType);
-			callback.CustomAttributes.Add (CreateUnmanagedCallersAttribute (name));
+			callback.CustomAttributes.Add (CreateUnmanagedCallersAttribute (name, method.DeclaringType));
 			infos.Add (new TrampolineInfo (callback, method, name));
 
 			// If the target method is marked, then we must mark the trampoline as well.
@@ -1242,10 +1242,15 @@ StaticRegistrar StaticRegistrar {
 			get { return DerivedLinkContext.StaticRegistrar; }
 		}
 
-		CustomAttribute CreateUnmanagedCallersAttribute (string entryPoint)
+		CustomAttribute CreateUnmanagedCallersAttribute (string entryPoint, TypeReference? associatedSourceType = null)
 		{
 			var unmanagedCallersAttribute = new CustomAttribute (abr.UnmanagedCallersOnlyAttribute_Constructor);
 			unmanagedCallersAttribute.Fields.Add (new CustomAttributeNamedArgument ("EntryPoint", new CustomAttributeArgument (abr.System_String, entryPoint)));
+			// The AssociatedSourceType field is only recognized by the NativeAOT compiler (ILC). The CoreCLR
+			// runtime's attribute parser rejects any UnmanagedCallersOnly named argument it doesn't know about,
+			// so only emit it when we're compiling for NativeAOT.
+			if (associatedSourceType is not null && App.XamarinRuntime == XamarinRuntime.NativeAOT)
+				unmanagedCallersAttribute.Fields.Add (new CustomAttributeNamedArgument ("AssociatedSourceType", new CustomAttributeArgument (abr.System_Type, associatedSourceType)));
 			return unmanagedCallersAttribute;
 		}