diff --git a/include/minix/ipc.h b/include/minix/ipc.h
index a34016ce7..1eef6fb1e 100644
--- a/include/minix/ipc.h
+++ b/include/minix/ipc.h
@@ -138,6 +138,7 @@ typedef struct asynmsg
 #define sendrec		_sendrec
 #define receive		_receive
 #define send		_send
+#define sendnb		_sendnb
 #define senda		_senda
 
 _PROTOTYPE( int echo, (message *m_ptr)					);
@@ -145,6 +146,7 @@ _PROTOTYPE( int notify, (endpoint_t dest)				);
 _PROTOTYPE( int sendrec, (endpoint_t src_dest, message *m_ptr)		);
 _PROTOTYPE( int receive, (endpoint_t src, message *m_ptr)	        );
 _PROTOTYPE( int send, (endpoint_t dest, message *m_ptr)			);
+_PROTOTYPE( int sendnb, (endpoint_t dest, message *m_ptr)		);
 _PROTOTYPE( int senda, (asynmsg_t *table, size_t count)			);
 
 #define ipc_request	_ipc_request