diff --git a/hgext/lfs/wireprotolfsserver.py b/hgext/lfs/wireprotolfsserver.py
--- a/hgext/lfs/wireprotolfsserver.py
+++ b/hgext/lfs/wireprotolfsserver.py
@@ -215,8 +215,8 @@ def _batchresponseobjects(req, objects, 
 
         rsp['actions'] = {
             '%s' % action: {
-                # TODO: Account for the --prefix, if any.
-                'href': '%s/.hg/lfs/objects/%s' % (req.baseurl, oid),
+                'href': '%s%s/.hg/lfs/objects/%s'
+                    % (req.baseurl, req.apppath, oid),
                 # datetime.isoformat() doesn't include the 'Z' suffix
                 "expires_at": expiresat.strftime('%Y-%m-%dT%H:%M:%SZ'),
                 'header': {
diff --git a/tests/test-lfs-serve-access.t b/tests/test-lfs-serve-access.t
--- a/tests/test-lfs-serve-access.t
+++ b/tests/test-lfs-serve-access.t
@@ -38,7 +38,7 @@ default cache, so it attempts to downloa
   $ hg --config "lfs.usercache=$TESTTMP/servercache" \
   >    --config "lfs.url=null://" \
   >    -R client push -q server
-  $ rm -rf `hg config lfs.usercache`
+  $ mv `hg config lfs.usercache` $TESTTMP/servercache
 
 Downloads fail...
 
@@ -65,3 +65,87 @@ Downloads fail...
   $LOCALIP - - [$LOGDATE$] "GET /?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull (glob)
   $LOCALIP - - [$LOGDATE$] "GET /?cmd=getbundle HTTP/1.1" 200 - x-hgarg-1:bookmarks=1&bundlecaps=HG20%2Cbundle2%3DHG20%250Abookmarks%250Achangegroup%253D01%252C02%252C03%250Adigests%253Dmd5%252Csha1%252Csha512%250Aerror%253Dabort%252Cunsupportedcontent%252Cpushraced%252Cpushkey%250Ahgtagsfnodes%250Alistkeys%250Aphases%253Dheads%250Apushkey%250Aremote-changegroup%253Dhttp%252Chttps%250Arev-branch-cache%250Astream%253Dv2&cg=1&common=0000000000000000000000000000000000000000&heads=525251863cad618e55d483555f3d00a2ca99597e&listkeys=bookmarks&phases=1 x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull (glob)
   $LOCALIP - - [$LOGDATE$] "POST /.git/info/lfs/objects/batch HTTP/1.1" 400 - (glob)
+
+Blob URIs are correct when --prefix is used
+
+  $ rm -f $TESTTMP/access.log $TESTTMP/errors.log
+  $ hg --config "lfs.usercache=$TESTTMP/servercache" -R server serve -d \
+  >    -p $HGPORT --pid-file=hg.pid --prefix=subdir/mount/point \
+  >    -A $TESTTMP/access.log -E $TESTTMP/errors.log
+  $ cat hg.pid >> $DAEMON_PIDS
+
+  $ hg --config lfs.url=http://localhost:$HGPORT/subdir/mount/point/.git/info/lfs \
+  >    clone --debug http://localhost:$HGPORT/subdir/mount/point cloned2
+  using http://localhost:$HGPORT/subdir/mount/point
+  sending capabilities command
+  query 1; heads
+  sending batch command
+  requesting all changes
+  sending getbundle command
+  bundle2-input-bundle: with-transaction
+  bundle2-input-part: "changegroup" (params: 1 mandatory 1 advisory) supported
+  adding changesets
+  add changeset 525251863cad
+  adding manifests
+  adding file changes
+  adding lfs.bin revisions
+  added 1 changesets with 1 changes to 1 files
+  calling hook pretxnchangegroup.lfs: hgext.lfs.checkrequireslfs
+  bundle2-input-part: total payload size 648
+  bundle2-input-part: "listkeys" (params: 1 mandatory) supported
+  bundle2-input-part: "phase-heads" supported
+  bundle2-input-part: total payload size 24
+  bundle2-input-part: "cache:rev-branch-cache" supported
+  bundle2-input-part: total payload size 39
+  bundle2-input-bundle: 3 parts total
+  checking for updated bookmarks
+  updating the branch cache
+  new changesets 525251863cad
+  updating to branch default
+  resolving manifests
+   branchmerge: False, force: False, partial: False
+   ancestor: 000000000000, local: 000000000000+, remote: 525251863cad
+  Status: 200
+  Content-Length: 371
+  Content-Type: application/vnd.git-lfs+json
+  Date: $HTTP_DATE$
+  Server: testing stub value
+  {
+    "objects": [
+      {
+        "actions": {
+          "download": {
+            "expires_at": "$ISO_8601_DATE_TIME$"
+            "header": {
+              "Accept": "application/vnd.git-lfs"
+            }
+            "href": "http://localhost:$HGPORT/subdir/mount/point/.hg/lfs/objects/f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e"
+          }
+        }
+        "oid": "f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e"
+        "size": 20
+      }
+    ]
+    "transfer": "basic"
+  }
+  lfs: downloading f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e (20 bytes)
+  Status: 200
+  Content-Length: 20
+  Content-Type: application/octet-stream
+  Date: $HTTP_DATE$
+  Server: testing stub value
+  lfs: adding f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e to the usercache
+  lfs: processed: f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e
+   lfs.bin: remote created -> g
+  getting lfs.bin
+  lfs: found f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e in the local lfs store
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+  $ $PYTHON $RUNTESTDIR/killdaemons.py $DAEMON_PIDS
+
+  $ cat $TESTTMP/access.log $TESTTMP/errors.log
+  $LOCALIP - - [$LOGDATE$] "GET /subdir/mount/point?cmd=capabilities HTTP/1.1" 200 - (glob)
+  $LOCALIP - - [$LOGDATE$] "GET /subdir/mount/point?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull (glob)
+  $LOCALIP - - [$LOGDATE$] "GET /subdir/mount/point?cmd=getbundle HTTP/1.1" 200 - x-hgarg-1:bookmarks=1&bundlecaps=HG20%2Cbundle2%3DHG20%250Abookmarks%250Achangegroup%253D01%252C02%252C03%250Adigests%253Dmd5%252Csha1%252Csha512%250Aerror%253Dabort%252Cunsupportedcontent%252Cpushraced%252Cpushkey%250Ahgtagsfnodes%250Alistkeys%250Aphases%253Dheads%250Apushkey%250Aremote-changegroup%253Dhttp%252Chttps%250Arev-branch-cache%250Astream%253Dv2&cg=1&common=0000000000000000000000000000000000000000&heads=525251863cad618e55d483555f3d00a2ca99597e&listkeys=bookmarks&phases=1 x-hgproto-1:0.1 0.2 comp=$USUAL_COMPRESSIONS$ partial-pull (glob)
+  $LOCALIP - - [$LOGDATE$] "POST /subdir/mount/point/.git/info/lfs/objects/batch HTTP/1.1" 200 - (glob)
+  $LOCALIP - - [$LOGDATE$] "GET /subdir/mount/point/.hg/lfs/objects/f03217a32529a28a42d03b1244fe09b6e0f9fd06d7b966d4d50567be2abe6c0e HTTP/1.1" 200 - (glob)