diff --git a/sys/i386/i386/mem.c b/sys/i386/i386/mem.c
index c129febc2cbb..379b59c88919 100644
--- a/sys/i386/i386/mem.c
+++ b/sys/i386/i386/mem.c
@@ -98,7 +98,6 @@ mmclose(struct cdev *dev, int flags, int fmt, struct thread *td)
 {
 	switch (minor(dev)) {
 	case 14:
-		td->td_proc->p_md.md_iopl = 0;
 		td->td_frame->tf_eflags &= ~PSL_IOPL;
 	}
 	return (0);
@@ -126,7 +125,6 @@ mmopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 		if (error != 0)
 			return (error);
 		td->td_frame->tf_eflags |= PSL_IOPL;
-		td->td_proc->p_md.md_iopl = PSL_IOPL;
 		break;
 	}
 	return (0);
diff --git a/sys/i386/include/proc.h b/sys/i386/include/proc.h
index 810a8e5821de..5b2c286c4e4e 100644
--- a/sys/i386/include/proc.h
+++ b/sys/i386/include/proc.h
@@ -52,7 +52,6 @@ struct mdthread {
 
 struct mdproc {
 	struct proc_ldt *md_ldt;	/* (j) per-process ldt */
-	uint32_t md_iopl;		/* process' iopl level */
 };
 
 #ifdef	_KERNEL