diff --git a/20000-efi-chainloader-fix-wrong-sanity-check-in-relocate_c.patch b/20000-efi-chainloader-fix-wrong-sanity-check-in-relocate_c.patch
deleted file mode 100644
index 93bbe53..0000000
--- a/20000-efi-chainloader-fix-wrong-sanity-check-in-relocate_c.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-From 725f07ed1e4e18836f54a0a798a8b1e720fae783 Mon Sep 17 00:00:00 2001
-From: Laszlo Ersek <lersek@redhat.com>
-Date: Mon, 21 Nov 2016 15:34:00 +0100
-Subject: [PATCH] efi/chainloader: fix wrong sanity check in relocate_coff()
-
-In relocate_coff(), the relocation entries are parsed from the original
-image (not the section-wise copied image). The original image is
-pointed-to by the "orig" pointer. The current check
-
-  (void *)reloc_end < data
-
-compares the addresses of independent memory allocations. "data" is a typo
-here, it should be "orig".
-
-Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1347291
-Signed-off-by: Laszlo Ersek <lersek@redhat.com>
-Tested-by: Bogdan Costescu <bcostescu@gmail.com>
-Tested-by: Juan Orti <j.orti.alcaine@gmail.com>
----
- grub-core/loader/efi/chainloader.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/grub-core/loader/efi/chainloader.c b/grub-core/loader/efi/chainloader.c
-index 49a7662fa605..1bd7ffb3160e 100644
---- a/grub-core/loader/efi/chainloader.c
-+++ b/grub-core/loader/efi/chainloader.c
-@@ -397,7 +397,7 @@ relocate_coff (pe_coff_loader_image_context_t *context,
-       reloc_end = (struct grub_pe32_fixup_block *)
- 	((char *)reloc_base + reloc_base->size);
- 
--      if ((void *)reloc_end < data || (void *)reloc_end > image_end)
-+      if ((void *)reloc_end < orig || (void *)reloc_end > image_end)
-         {
-           grub_error (GRUB_ERR_BAD_ARGUMENT, "Reloc entry %d overflows binary",
- 		      n);
--- 
-2.9.2
-
diff --git a/grub2.spec b/grub2.spec
index 989fcd4..62b1d61 100644
--- a/grub2.spec
+++ b/grub2.spec
@@ -72,12 +72,6 @@ Patch10004: 10004-Add-grub_qdprintf-grub_dprintf-without-the-file-lin.patch
 Patch10005: 10005-Make-a-gdb-dprintf-that-tells-us-load-addresses.patch
 #Patch10006: 10006-Try-it-in-gentpl-again.patch
 
-# This is: https://bugzilla.redhat.com/attachment.cgi?id=1222471
-# From: https://bugzilla.redhat.com/show_bug.cgi?id=1347291
-# Patch by Laszlo Ersek to fix a bad sanity check which causes issues
-# with UEFI Windows dual boot. Should be sent upstream.
-Patch20000: 20000-efi-chainloader-fix-wrong-sanity-check-in-relocate_c.patch
-
 BuildRequires:  flex bison binutils python
 BuildRequires:  ncurses-devel xz-devel bzip2-devel
 BuildRequires:  freetype-devel libusb-devel