diff --git a/307.patch b/307.patch
new file mode 100644
index 0000000..16d4043
--- /dev/null
+++ b/307.patch
@@ -0,0 +1,30 @@
+From 7b94c5ac957cfa9d51815747d48dbec2d57a9aaa Mon Sep 17 00:00:00 2001
+From: Jakub Janczak <jakub.janczak@scrive.com>
+Date: Wed, 8 Feb 2023 21:33:24 +0100
+Subject: [PATCH] Fix for machines with 64bit word and base >= 4.17
+
+---
+ cborg/src/Codec/CBOR/Magic.hs | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/cborg/src/Codec/CBOR/Magic.hs b/cborg/src/Codec/CBOR/Magic.hs
+index 1b497a2..cdeb455 100644
+--- a/cborg/src/Codec/CBOR/Magic.hs
++++ b/cborg/src/Codec/CBOR/Magic.hs
+@@ -257,11 +257,15 @@ grabWord64 (Ptr ip#) =
+ #endif
+ 
+ #if WORD_SIZE_IN_BITS == 64
++#if MIN_VERSION_base(4,17,0)
++-- case taken from Codec.CBOR.Decoding
++    w64 w# = W64# (wordToWord64# (toWord w#))
++#else
+     w64 w# = W64# (toWord w#)
++#endif
+ #else
+     w64 w# = W64# (wordToWord64# (toWord w#))
+ #endif
+-
+ #endif
+ 
+ --------------------------------------------------------------------------------
diff --git a/ghc-cborg.spec b/ghc-cborg.spec
index 7f2bb51..bc0a10e 100644
--- a/ghc-cborg.spec
+++ b/ghc-cborg.spec
@@ -20,6 +20,7 @@ Url:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkgver}/%{pkgver}.tar.gz
 Source1:        https://hackage.haskell.org/package/%{pkgver}/%{pkg_name}.cabal#/%{pkgver}.cabal
 # End cabal-rpm sources
+Patch0:         https://patch-diff.githubusercontent.com/raw/well-typed/cborg/pull/307.patch
 
 # Begin cabal-rpm deps:
 BuildRequires:  dos2unix
@@ -117,6 +118,7 @@ This package provides the Haskell %{pkg_name} profiling library.
 %setup -q -n %{pkgver}
 dos2unix -k -n %{SOURCE1} %{pkg_name}.cabal
 # End cabal-rpm setup
+%patch0 -p2 -b .orig
 
 
 %build