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Diffstat (limited to 'sysdeps/unix/sysv/linux/shmctl.c')
-rw-r--r--sysdeps/unix/sysv/linux/shmctl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/shmctl.c b/sysdeps/unix/sysv/linux/shmctl.c
index 3b2809ac5d..8ff911bca8 100644
--- a/sysdeps/unix/sysv/linux/shmctl.c
+++ b/sysdeps/unix/sysv/linux/shmctl.c
@@ -65,7 +65,7 @@ int
 __old_shmctl (int shmid, int cmd, struct __old_shmid_ds *buf)
 {
   return INLINE_SYSCALL (ipc, 5, IPCOP_shmctl, shmid,
-			 cmd, 0, CHECK_1opt (buf));
+			 cmd, 0, CHECK_1_NULL_OK (buf));
 }
 compat_symbol (libc, __old_shmctl, shmctl, GLIBC_2_0);
 #endif