diff --git a/Source/SocketIOLib/SocketIOLib.Build.cs b/Source/SocketIOLib/SocketIOLib.Build.cs
index eec6c8c..2835db1 100644
--- a/Source/SocketIOLib/SocketIOLib.Build.cs
+++ b/Source/SocketIOLib/SocketIOLib.Build.cs
@@ -72,6 +72,14 @@ public SocketIOLib(ReadOnlyTargetRules Target) : base(Target)
 				{
 					PublicDefinitions.Add("SIO_TLS=1");
 				}
+				
+				if (
+					(Target.Version.MajorVersion == 5 && Target.Version.MinorVersion >= 3) ||
+					Target.Version.MajorVersion > 5
+				)
+				{
+					PublicDefinitions.Add("ASIO_HAS_STD_INVOKE_RESULT=1");
+				}
 			}
 	}
 }