Index: src/OFTCPSocket.h
==================================================================
--- src/OFTCPSocket.h
+++ src/OFTCPSocket.h
@@ -33,12 +33,12 @@
  *
  * @param socket The socket which connected
  * @param exception An exception which occurred while connecting the socket or
  *		    `nil` on success
  */
-typedef void (^of_tcp_socket_async_connect_block_t)(OFTCPSocket *socket,
-    id _Nullable exception);
+typedef void (^of_tcp_socket_async_connect_block_t)(
+    OF_KINDOF(OFTCPSocket *) socket, id _Nullable exception);
 
 /*!
  * @brief A block which is called when the socket accepted a connection.
  *
  * @param socket The socket which accepted the connection
@@ -46,12 +46,13 @@
  * @param exception An exception which occurred while accepting the socket or
  *		    `nil` on success
  * @return A bool whether the same block should be used for the next incoming
  *	   connection
  */
-typedef bool (^of_tcp_socket_async_accept_block_t)(OFTCPSocket *socket,
-    OFTCPSocket *acceptedSocket, id _Nullable exception);
+typedef bool (^of_tcp_socket_async_accept_block_t)(
+    OF_KINDOF(OFTCPSocket *) socket, OF_KINDOF(OFTCPSocket *) acceptedSocket,
+    id _Nullable exception);
 #endif
 
 /*!
  * @class OFTCPSocket OFTCPSocket.h ObjFW/OFTCPSocket.h
  *