diff --git a/0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch b/0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch
new file mode 100644
index 0000000..f52b9c1
--- /dev/null
+++ b/0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch
@@ -0,0 +1,29 @@
+From 8f62d424f52cda226f5b7102f2de45e92b72b552 Mon Sep 17 00:00:00 2001
+From: Peter Simons <simons@cryp.to>
+Date: Wed, 1 Feb 2023 16:03:29 +0100
+Subject: [PATCH] Adapt FastShift instances for Word32 to ghc-9.4.x.
+
+---
+ Data/BloomFilter/Util.hs | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/Data/BloomFilter/Util.hs b/Data/BloomFilter/Util.hs
+index 7f695dc..6868209 100644
+--- a/Data/BloomFilter/Util.hs
++++ b/Data/BloomFilter/Util.hs
+@@ -40,10 +40,10 @@ class FastShift a where
+ 
+ instance FastShift Word32 where
+     {-# INLINE shiftL #-}
+-    shiftL (W32# x#) (I# i#) = W32# (x# `uncheckedShiftL#` i#)
++    shiftL (W32# x#) (I# i#) = W32# (x# `uncheckedShiftLWord32#` i#)
+ 
+     {-# INLINE shiftR #-}
+-    shiftR (W32# x#) (I# i#) = W32# (x# `uncheckedShiftRL#` i#)
++    shiftR (W32# x#) (I# i#) = W32# (x# `uncheckedShiftRLWord32#` i#)
+ 
+ instance FastShift Word64 where
+     {-# INLINE shiftL #-}
+-- 
+2.38.1
+
diff --git a/ghc-bloomfilter.spec b/ghc-bloomfilter.spec
index 7507ac8..354bcef 100644
--- a/ghc-bloomfilter.spec
+++ b/ghc-bloomfilter.spec
@@ -26,6 +26,7 @@ License:        BSD-3-Clause
 URL:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
 Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/2.cabal#/%{pkg_name}.cabal
+Patch1:         0001-Adapt-FastShift-instances-for-Word32-to-ghc-9.4.x.patch
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-array-devel
 BuildRequires:  ghc-bytestring-devel
@@ -53,8 +54,9 @@ Requires(postun): ghc-compiler = %{ghc_version}
 This package provides the Haskell %{pkg_name} library development files.
 
 %prep
-%autosetup -n %{pkg_name}-%{version}
+%autosetup -p1 -n %{pkg_name}-%{version}
 cp -p %{SOURCE1} %{pkg_name}.cabal
+cabal-tweak-dep-ver base '>= 4.4 && < 4.16' '< 5'
 
 %build
 %ghc_lib_build