diff --git a/include/minix/callnr.h b/include/minix/callnr.h
index 5c91e70e4..2204baba6 100644
--- a/include/minix/callnr.h
+++ b/include/minix/callnr.h
@@ -232,11 +232,6 @@
 
 #define NR_VFS_CALLS		49	/* highest number from base plus one */
 
-/* Field names for the ioctl(2) call. */
-#define VFS_IOCTL_FD		m2_i1	/* int */
-#define VFS_IOCTL_REQ		m2_i3	/* unsigned long */
-#define VFS_IOCTL_ARG		m2_p1	/* void * */
-
 /* Field names for the checkperms(2) call. */
 #define VFS_CHECKPERMS_ENDPT	m2_i1	/* endpoint_t */
 #define VFS_CHECKPERMS_GRANT	m2_i2	/* cp_grant_id_t */
diff --git a/include/minix/ipc.h b/include/minix/ipc.h
index 5d56726ee..1cdded91f 100644
--- a/include/minix/ipc.h
+++ b/include/minix/ipc.h
@@ -155,6 +155,15 @@ typedef struct {
 } mess_lc_vfs_getvfsstat;
 _ASSERT_MSG_SIZE(mess_lc_vfs_getvfsstat);
 
+typedef struct {
+	int fd;
+	unsigned long req;
+	void *arg;
+
+	uint8_t padding[44];
+} mess_lc_vfs_ioctl;
+_ASSERT_MSG_SIZE(mess_lc_vfs_ioctl);
+
 typedef struct {
 	int flags;
 	size_t devlen;
@@ -654,6 +663,7 @@ typedef struct {
 		mess_fs_vfs_readwrite	m_fs_vfs_readwrite;
 
 		mess_lc_vfs_getvfsstat	m_lc_vfs_getvfsstat;
+		mess_lc_vfs_ioctl	m_lc_vfs_ioctl;
 		mess_lc_vfs_mount	m_lc_vfs_mount;
 		mess_lc_vfs_select	m_lc_vfs_select;
 		mess_lc_vfs_statvfs1	m_lc_vfs_statvfs1;
diff --git a/lib/libc/sys-minix/ioctl.c b/lib/libc/sys-minix/ioctl.c
index 12cea4b6d..09b3c04ea 100644
--- a/lib/libc/sys-minix/ioctl.c
+++ b/lib/libc/sys-minix/ioctl.c
@@ -76,9 +76,9 @@ int     ioctl(int fd, unsigned long request, ...)
   }
 
   memset(&m, 0, sizeof(m));
-  m.VFS_IOCTL_FD = fd;
-  m.VFS_IOCTL_REQ = request;
-  m.VFS_IOCTL_ARG = (char *) addr;
+  m.m_lc_vfs_ioctl.fd = fd;
+  m.m_lc_vfs_ioctl.req = request;
+  m.m_lc_vfs_ioctl.arg = addr;
 
   r = _syscall(VFS_PROC_NR, VFS_IOCTL, &m);
 
diff --git a/servers/vfs/device.c b/servers/vfs/device.c
index b5178bcbd..388286134 100644
--- a/servers/vfs/device.c
+++ b/servers/vfs/device.c
@@ -492,9 +492,9 @@ int do_ioctl(void)
   dev_t dev;
   void *argx;
 
-  scratch(fp).file.fd_nr = job_m_in.VFS_IOCTL_FD;
-  ioctlrequest = job_m_in.VFS_IOCTL_REQ;
-  argx = job_m_in.VFS_IOCTL_ARG;
+  scratch(fp).file.fd_nr = job_m_in.m_lc_vfs_ioctl.fd;
+  ioctlrequest = job_m_in.m_lc_vfs_ioctl.req;
+  argx = job_m_in.m_lc_vfs_ioctl.arg;
 
   if ((f = get_filp(scratch(fp).file.fd_nr, VNODE_READ)) == NULL)
 	return(err_code);