diff --git a/include/minix/callnr.h b/include/minix/callnr.h
index 565a4ed23..06330767e 100644
--- a/include/minix/callnr.h
+++ b/include/minix/callnr.h
@@ -232,12 +232,6 @@
 
 #define NR_VFS_CALLS		49	/* highest number from base plus one */
 
-/* Field names for the creat(2) call. */
-#define VFS_CREAT_NAME		m1_p1	/* const char * */
-#define VFS_CREAT_LEN		m1_i1	/* size_t */
-#define VFS_CREAT_FLAGS		m1_i2	/* int */
-#define VFS_CREAT_MODE		m1_i3	/* mode_t */
-
 /* Field names for the chown(2) and fchown(2) calls. */
 #define VFS_CHOWN_NAME		m1_p1	/* const char * */
 #define VFS_CHOWN_LEN		m1_i1	/* size_t */
diff --git a/include/minix/ipc.h b/include/minix/ipc.h
index 0f5dffe24..03225e066 100644
--- a/include/minix/ipc.h
+++ b/include/minix/ipc.h
@@ -145,6 +145,16 @@ typedef struct {
 } mess_sigcalls;
 _ASSERT_MSG_SIZE(mess_sigcalls);
 
+typedef struct {
+	vir_bytes name;
+	size_t len;
+	int flags;
+	mode_t mode;
+
+	uint8_t padding[40];
+} mess_lc_vfs_creat;
+_ASSERT_MSG_SIZE(mess_lc_vfs_creat);
+
 typedef struct {
 	int fd;
 	int cmd;
@@ -806,6 +816,7 @@ typedef struct {
 		mess_fs_vfs_readsuper	m_fs_vfs_readsuper;
 		mess_fs_vfs_readwrite	m_fs_vfs_readwrite;
 
+		mess_lc_vfs_creat	m_lc_vfs_creat;
 		mess_lc_vfs_fcntl	m_lc_vfs_fcntl;
 		mess_lc_vfs_fstat	m_lc_vfs_fstat;
 		mess_lc_vfs_fsync	m_lc_vfs_fsync;
diff --git a/lib/libc/sys-minix/open.c b/lib/libc/sys-minix/open.c
index 7f5a6dd7e..baafbd606 100644
--- a/lib/libc/sys-minix/open.c
+++ b/lib/libc/sys-minix/open.c
@@ -18,10 +18,10 @@ int open(const char *name, int flags, ...)
    * and therefore a different call number as well.
    */
   if (flags & O_CREAT) {
-	m.VFS_CREAT_LEN = strlen(name) + 1;
-	m.VFS_CREAT_FLAGS = flags;
-	m.VFS_CREAT_MODE = va_arg(argp, int);
-	m.VFS_CREAT_NAME = (char *) __UNCONST(name);
+	m.m_lc_vfs_creat.len = strlen(name) + 1;
+	m.m_lc_vfs_creat.flags = flags;
+	m.m_lc_vfs_creat.mode = va_arg(argp, mode_t);
+	m.m_lc_vfs_creat.name = (vir_bytes)name;
 	call = VFS_CREAT;
   } else {
 	_loadname(name, &m);
diff --git a/servers/vfs/open.c b/servers/vfs/open.c
index e60608d7c..205de3c27 100644
--- a/servers/vfs/open.c
+++ b/servers/vfs/open.c
@@ -64,10 +64,10 @@ int do_creat(void)
   vir_bytes vname;
   size_t vname_length;
 
-  vname = (vir_bytes) job_m_in.VFS_CREAT_NAME;
-  vname_length = (size_t) job_m_in.VFS_CREAT_LEN;
-  open_flags = job_m_in.VFS_CREAT_FLAGS;
-  create_mode = job_m_in.VFS_CREAT_MODE;
+  vname = job_m_in.m_lc_vfs_creat.name;
+  vname_length = job_m_in.m_lc_vfs_creat.len;
+  open_flags = job_m_in.m_lc_vfs_creat.flags;
+  create_mode = job_m_in.m_lc_vfs_creat.mode;
 
   if (!(open_flags & O_CREAT))
 	return(EINVAL);