diff --git a/src/mds/locks.c b/src/mds/locks.c
index e66c6810095..19cc795a0e8 100644
--- a/src/mds/locks.c
+++ b/src/mds/locks.c
@@ -22,7 +22,7 @@ struct sm_state_t simplelock[20] = {
     [LOCK_SYNC_LOCK] = { LOCK_LOCK, false, LOCK_LOCK, ANY,  0,   0,   0,   0,   0,   0,0,0 }, 
     [LOCK_EXCL_LOCK] = { LOCK_LOCK, false, LOCK_LOCK, 0,    0,   0,   0,   0,   0,   0,0,0 },
 
-    [LOCK_XLOCK]     = { 0,         false, LOCK_LOCK, 0,    XCL, 0,   0,   0,   0,   0,0,0 },
+    [LOCK_XLOCK]     = { LOCK_SYNC, false, LOCK_LOCK, 0,    XCL, 0,   0,   0,   0,   0,0,0 },
     [LOCK_XLOCKDONE] = { LOCK_SYNC, false, LOCK_LOCK, XCL,  XCL, XCL, 0,   XCL, XCL, 0,0,0 },
     [LOCK_LOCK_XLOCK]= { LOCK_XLOCK,false, LOCK_LOCK, 0,    0,   0,   0,   0,   0,   0,0,0 },
 
@@ -88,7 +88,7 @@ struct sm_state_t filelock[30] = {
     [LOCK_EXCL_LOCK] = { LOCK_LOCK, false, LOCK_LOCK, 0,    0,   0,   0,   0,   0,   CEPH_CAP_GRDCACHE|CEPH_CAP_GWRBUFFER,0,CEPH_CAP_GRDCACHE },
     [LOCK_MIX_LOCK]  = { LOCK_LOCK, false, LOCK_LOCK, AUTH, 0,   0,   0,   0,   0,   0,0,0 },
 
-    [LOCK_XLOCK]     = { 0,         false, LOCK_LOCK, 0,    XCL, 0,   0,   0,   0,   0,0,0 },
+    [LOCK_XLOCK]     = { LOCK_SYNC, false, LOCK_LOCK, 0,    XCL, 0,   0,   0,   0,   0,0,0 },
     [LOCK_XLOCKDONE] = { LOCK_SYNC, false, LOCK_LOCK, XCL,  XCL, XCL, 0,   XCL, XCL, 0,0,0 },
 
     [LOCK_MIX]       = { 0,         false, LOCK_MIX,  0,    0,   FW,  ANY, 0,   0,   CEPH_CAP_GRD|CEPH_CAP_GWR,0,CEPH_CAP_GRD },