diff --git a/0001-lib-Use-qemu-img-info-U-option-to-avoid-locking-erro.patch b/0001-lib-Use-qemu-img-info-U-option-to-avoid-locking-erro.patch
deleted file mode 100644
index 8628850..0000000
--- a/0001-lib-Use-qemu-img-info-U-option-to-avoid-locking-erro.patch
+++ /dev/null
@@ -1,103 +0,0 @@
-From f00f920ad3b15ab8e9e8f201c16e7628b6b7b109 Mon Sep 17 00:00:00 2001
-From: "Richard W.M. Jones" <rjones@redhat.com>
-Date: Wed, 12 Sep 2018 17:16:20 +0100
-Subject: [PATCH] lib: Use qemu-img info -U option to avoid locking error.
-
-https://bugs.launchpad.net/qemu/+bug/1740364
----
- lib/guestfs-internal.h |  3 +++
- lib/handle.c           |  2 ++
- lib/info.c             | 39 +++++++++++++++++++++++++++++++++++++++
- 3 files changed, 44 insertions(+)
-
-diff --git a/lib/guestfs-internal.h b/lib/guestfs-internal.h
-index 471244264..6c339ae81 100644
---- a/lib/guestfs-internal.h
-+++ b/lib/guestfs-internal.h
-@@ -510,6 +510,9 @@ struct guestfs_h {
-   /* Cached features. */
-   struct cached_feature *features;
-   size_t nr_features;
-+
-+  /* Used by lib/info.c.  -1 = not tested or error; else 0 or 1. */
-+  int qemu_img_supports_U_option;
- };
- 
- /**
-diff --git a/lib/handle.c b/lib/handle.c
-index a47aaafab..297ff6d67 100644
---- a/lib/handle.c
-+++ b/lib/handle.c
-@@ -101,6 +101,8 @@ guestfs_create_flags (unsigned flags, ...)
- 
-   g->memsize = DEFAULT_MEMSIZE;
- 
-+  g->qemu_img_supports_U_option = -1; /* not tested, see lib/info.c */
-+
-   /* Start with large serial numbers so they are easy to spot
-    * inside the protocol.
-    */
-diff --git a/lib/info.c b/lib/info.c
-index 2eadc1c11..4dee7a26a 100644
---- a/lib/info.c
-+++ b/lib/info.c
-@@ -57,6 +57,7 @@ cleanup_json_t_decref (void *ptr)
- #endif
- 
- static json_t *get_json_output (guestfs_h *g, const char *filename);
-+static int qemu_img_supports_U_option (guestfs_h *g);
- static void set_child_rlimits (struct command *);
- 
- char *
-@@ -149,6 +150,11 @@ get_json_output (guestfs_h *g, const char *filename)
- 
-   guestfs_int_cmd_add_arg (cmd, "qemu-img");
-   guestfs_int_cmd_add_arg (cmd, "info");
-+  switch (qemu_img_supports_U_option (g)) {
-+  case -1: return NULL;
-+  case 0:  break;
-+  default: guestfs_int_cmd_add_arg (cmd, "-U");
-+  }
-   guestfs_int_cmd_add_arg (cmd, "--output");
-   guestfs_int_cmd_add_arg (cmd, "json");
-   if (filename[0] == '/')
-@@ -218,3 +224,36 @@ set_child_rlimits (struct command *cmd)
-   guestfs_int_cmd_set_child_rlimit (cmd, RLIMIT_CPU, 10 /* seconds */);
- #endif
- }
-+
-+/**
-+ * Test if the qemu-img info command supports the C<-U> option to
-+ * disable locking.  The result is memoized in the handle.
-+ *
-+ * Note this option was added in qemu 2.11.  We can remove this test
-+ * when we can assume everyone is using qemu >= 2.11.
-+ */
-+static int
-+qemu_img_supports_U_option (guestfs_h *g)
-+{
-+  if (g->qemu_img_supports_U_option >= 0)
-+    return g->qemu_img_supports_U_option;
-+
-+  CLEANUP_CMD_CLOSE struct command *cmd = guestfs_int_new_command (g);
-+  int r;
-+
-+  guestfs_int_cmd_add_string_unquoted (cmd,
-+                                       "qemu-img --help | "
-+                                       "grep -sqE -- '\\binfo\\b.*-U\\b'");
-+  r = guestfs_int_cmd_run (cmd);
-+  if (r == -1)
-+    return -1;
-+  if (!WIFEXITED (r)) {
-+    guestfs_int_external_command_failed (g, r,
-+                                         "qemu-img info -U option test",
-+                                         NULL);
-+    return -1;
-+  }
-+
-+  g->qemu_img_supports_U_option = WEXITSTATUS (r) == 0;
-+  return g->qemu_img_supports_U_option;
-+}
--- 
-2.19.2
-
diff --git a/libguestfs.spec b/libguestfs.spec
index 97c549d..055d1c1 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -50,9 +50,6 @@ Source0:       http://libguestfs.org/download/1.38-stable/%{name}-%{version}.tar
 Source1:       http://libguestfs.org/download/1.38-stable/%{name}-%{version}.tar.gz.sig
 %endif
 
-# https://bugzilla.redhat.com/show_bug.cgi?id=1664318
-Patch1:        0001-lib-Use-qemu-img-info-U-option-to-avoid-locking-erro.patch
-
 # Replacement README file for Fedora users.
 Source4:       README-replacement.in
 
@@ -1409,6 +1406,7 @@ install -m 0644 utils/boot-benchmark/boot-benchmark.1 $RPM_BUILD_ROOT%{_mandir}/
 %changelog
 * Thu Jan 17 2019 Richard W.M. Jones <rjones@redhat.com> - 1:1.40.1-1
 - New upstream version 1.40.1.
+- Remove patch which is now upstream.
 
 * Mon Jan 14 2019 Björn Esser <besser82@fedoraproject.org> - 1:1.39.11-4
 - Rebuilt for libcrypt.so.2 (#1666033)