diff --git a/include/sys/ipc.h b/include/sys/ipc.h
index 724654305b..6c6d3f953a 100644
--- a/include/sys/ipc.h
+++ b/include/sys/ipc.h
@@ -35,10 +35,10 @@
 
 /* Mode bits:  The lower order 9-bit bits are the standard mode bits */
 
-#define IPC_MODE    0x01ff     /* Mode bit mask */
-#define IPC_CREAT   (1 << 10)  /* Create entry if key does not exist */
-#define IPC_EXCL    (1 << 11)  /* Fail if key exists */
-#define IPC_NOWAIT  (1 << 12)  /* Error if request must wait */
+#define IPC_MODE   0x01ff /* Mode bit mask */
+#define IPC_CREAT  0x0200 /* Create key if key does not exist. */
+#define IPC_EXCL   0x0400 /* Fail if key exists.  */
+#define IPC_NOWAIT 0x0800 /* Return error on wait.  */
 
 /* Keys: */