diff --git a/patches/003-dav-locks-parsing.patch b/patches/003-dav-locks-parsing.patch
new file mode 100644
index 0000000..f6ae495
--- /dev/null
+++ b/patches/003-dav-locks-parsing.patch
@@ -0,0 +1,18 @@
+--- a/vendor/github.com/cs3org/reva/v2/internal/http/services/owncloud/ocdav/locks.go
++++ b/vendor/github.com/cs3org/reva/v2/internal/http/services/owncloud/ocdav/locks.go
+@@ -649,5 +649,13 @@ func (s *svc) unlockReference(ctx context.Context, _ http.ResponseWriter, r *htt
+ }
+ 
+ func requestLockToken(r *http.Request) string {
+-	return strings.TrimSuffix(strings.TrimPrefix(r.Header.Get(net.HeaderLockToken), "<"), ">")
++	h := r.Header.Get(net.HeaderLockToken)
++	if len(h) == 0 {
++		h = r.Header.Get(net.HeaderIf)
++		if untagged := strings.Index(h, "(<"); untagged > 0 {
++			h = h[untagged:]
++		}
++		h = strings.TrimSuffix(strings.TrimPrefix(h, "("), ")")
++	}
++	return strings.TrimSuffix(strings.TrimPrefix(h, "<"), ">")
+ }
+