diff --git a/include/minix/ipc.h b/include/minix/ipc.h
index 91ff07745..a34016ce7 100644
--- a/include/minix/ipc.h
+++ b/include/minix/ipc.h
@@ -20,6 +20,8 @@ typedef struct {long m6l1, m6l2, m6l3; short m6s1, m6s2, m6s3; char m6c1, m6c2;
         char *m6p1, *m6p2;} mess_6;
 typedef struct {int m7i1, m7i2, m7i3, m7i4; char *m7p1, *m7p2;} mess_7;
 typedef struct {int m8i1, m8i2; char *m8p1, *m8p2, *m8p3, *m8p4;} mess_8;
+typedef struct {long m9l1, m9l2, m9l3, m9l4, m9l5; short m9s1, m9s2, m9s3;
+	char m9c1, m9c2; } mess_9;
 
 typedef struct {
   endpoint_t m_source;		/* who sent the message */
@@ -33,6 +35,7 @@ typedef struct {
 	mess_7 m_m7;
 	mess_8 m_m8;
 	mess_6 m_m6;
+	mess_9 m_m9;
   } m_u;
 } message;
 
@@ -97,6 +100,17 @@ typedef struct {
 #define m8_p3  m_u.m_m8.m8p3
 #define m8_p4  m_u.m_m8.m8p4
 
+#define m9_l1  m_u.m_m9.m9l1
+#define m9_l2  m_u.m_m9.m9l2
+#define m9_l3  m_u.m_m9.m9l3
+#define m9_l4  m_u.m_m9.m9l4
+#define m9_l5  m_u.m_m9.m9l5
+#define m9_s1  m_u.m_m9.m9s1
+#define m9_s2  m_u.m_m9.m9s2
+#define m9_s3  m_u.m_m9.m9s3
+#define m9_c1  m_u.m_m9.m9c1
+#define m9_c2  m_u.m_m9.m9c2
+
 /*==========================================================================* 
  * Minix run-time system (IPC). 					    *
  *==========================================================================*/