4 files changed, 8 insertions, 6 deletions
diff --git a/libc/misc/sysvipc/ipc.h b/libc/misc/sysvipc/ipc.h
index 741b720bc..e1b94ad12 100644
--- a/libc/misc/sysvipc/ipc.h
+++ b/libc/misc/sysvipc/ipc.h
@@ -4,6 +4,8 @@
 
 #ifdef __NR_ipc
 
+#define __IPC_64	0x100
+
 /* The actual system call: all functions are multiplexed by this.  */
 extern int __syscall_ipc __P((int __call, int __first, int __second,
 					  int __third, void *__ptr));
diff --git a/libc/misc/sysvipc/msgq.c b/libc/misc/sysvipc/msgq.c
index d4f48e7ad..411ea3ea4 100644
--- a/libc/misc/sysvipc/msgq.c
+++ b/libc/misc/sysvipc/msgq.c
@@ -6,12 +6,12 @@
 #ifdef L_msgctl
 
 #ifdef __NR_msgctl
-_syscall3(int, msgctl, int, msqid, int, cmd, struct msqid_ds *, buf);
+_syscall3(int, msgctl, int, msqid, int, cmd | __IPC_64, struct msqid_ds *, buf);
 #else
 /* Message queue control operation.  */
 int msgctl (int msqid, int cmd, struct msqid_ds *buf)
 {
-    return __syscall_ipc(IPCOP_msgctl ,msqid ,cmd ,0 ,buf);
+    return __syscall_ipc(IPCOP_msgctl ,msqid ,cmd | __IPC_64 ,0 ,buf);
 }
 #endif
 #endif
diff --git a/libc/misc/sysvipc/sem.c b/libc/misc/sysvipc/sem.c
index 8c9672bad..ccbe25b46 100644
--- a/libc/misc/sysvipc/sem.c
+++ b/libc/misc/sysvipc/sem.c
@@ -51,9 +51,9 @@ int semctl(int semid, int semnum, int cmd, ...)
     arg = va_arg (ap, union semun);
     va_end (ap);
 #ifdef __NR_semctl
-    return __semctl(semid, semnum, cmd, arg.__pad);
+    return __semctl(semid, semnum, cmd | __IPC_64, arg.__pad);
 #else
-    return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd, &arg);
+    return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd | __IPC_64, &arg);
 #endif
 }
 #endif
diff --git a/libc/misc/sysvipc/shm.c b/libc/misc/sysvipc/shm.c
index 8193ac2f0..d21d9f54b 100644
--- a/libc/misc/sysvipc/shm.c
+++ b/libc/misc/sysvipc/shm.c
@@ -48,11 +48,11 @@ void * shmat (int shmid, const void *shmaddr, int shmflg)
 #ifdef L_shmctl
 /* Provide operations to control over shared memory segments.  */
 #ifdef __NR_shmctl
-_syscall3(int, shmctl, int, shmid, int, cmd, struct shmid_ds *, buf);
+_syscall3(int, shmctl, int, shmid, int, cmd | __IPC_64, struct shmid_ds *, buf);
 #else
 int shmctl (int shmid, int cmd, struct shmid_ds *buf)
 {
-    return __syscall_ipc(IPCOP_shmctl, shmid, cmd, 0, buf);
+    return __syscall_ipc(IPCOP_shmctl, shmid, cmd | __IPC_64 , 0, buf);
 }
 #endif
 #endif