diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index a00d84ae1c89..2fe2d00993a5 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -1937,6 +1937,7 @@ vget(vp, flags, td)
 		} else {
 			vp->v_iflag |= VI_XWANT;
 			msleep(vp, VI_MTX(vp), PINOD | PDROP, "vget", 0);
+			mp_fixme("interlock not released.");
 			return (ENOENT);
 		}
 	}
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
index fc6c78e7452f..875e3f0a0910 100644
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -843,6 +843,7 @@ debug_vn_lock(vp, flags, td, filename, line)
 			vp->v_iflag |= VI_XWANT;
 			msleep(vp, VI_MTX(vp), PINOD | PDROP,
 			    "vn_lock", 0);
+			mp_fixme("interlock not released.");
 			error = ENOENT;
 		} else {
 #if 0