Index: src/OFTCPSocket.h
==================================================================
--- src/OFTCPSocket.h
+++ src/OFTCPSocket.h
@@ -126,10 +126,13 @@
 /**
  * @brief Whether the socket uses MPTCP.
  *
  * If you want to use MPTCP, set this to true before connecting or binding.
  * After connecting or binding, this returns whether MPTCP was used.
+ *
+ * @note After connecting, this method may return `false` even when MPTCP was
+ *	 used. This is an OS limitation.
  */
 @property (nonatomic) bool usesMPTCP;
 
 /**
  * @brief The host to use as a SOCKS5 proxy.