diff --git a/src/ipc/lowlevel.cr b/src/ipc/lowlevel.cr
index d9681cd..28b6376 100644
--- a/src/ipc/lowlevel.cr
+++ b/src/ipc/lowlevel.cr
@@ -131,6 +131,7 @@ lib LibIPC
 		Closing       #
 		Error         #
 		ParsingError  #
+		Ignore        #
 	end
 
 	# Changing the callbacks for switched fd.
@@ -138,9 +139,10 @@ lib LibIPC
 	# , enum ipccb cb_in  (fd, *ipc_message)
 	# , enum ipccb cb_out (fd, *ipc_message)
 	fun ipc_switching_callbacks(Ctx*, LibC::Int,
-		cb_in  : (LibC::Int, Pointer(LibIPC::Message)) -> LibIPC::IPCCB,
-		cb_out : (LibC::Int, Pointer(LibIPC::Message)) -> LibIPC::IPCCB) : IPCError
+		(LibC::Int, LibIPC::Message* -> LibIPC::IPCCB),
+		(LibC::Int, LibIPC::Message* -> LibIPC::IPCCB))
 
+	fun ipc_ctx_switching_add  (ctx : Ctx*, fd1 : LibC::Int, fd2 : LibC::Int)       # Void
 	fun ipc_switching_add  (switch : Switchings*, fd1 : LibC::Int, fd2 : LibC::Int) # Void
 	fun ipc_switching_del  (switch : Switchings*, fd  : LibC::Int                 ) : LibC::Int
 	fun ipc_switching_get  (switch : Switchings*, fd  : LibC::Int                 ) : LibC::Int
diff --git a/src/ipc/message.cr b/src/ipc/message.cr
index 1b1ca55..74d67b8 100644
--- a/src/ipc/message.cr
+++ b/src/ipc/message.cr
@@ -23,7 +23,7 @@ class IPC::Message
 	def self.from_json (str : String)
 		jsonmessage = JSONMessage.from_json str
 
-		IPC::Message.new jsonmessage.mtype, jsonmessage.utype, jsonmessage.payload
+		IPC::Message.new 0, jsonmessage.mtype, jsonmessage.utype, jsonmessage.payload
 	end
 
 	def to_json