diff --git a/cassava-bytestring.patch b/cassava-bytestring.patch
deleted file mode 100644
index 8645d29..0000000
--- a/cassava-bytestring.patch
+++ /dev/null
@@ -1,12 +0,0 @@
---- cassava-0.5.1.0/cassava.cabal	2019-08-06 02:57:54.003159478 +0800
-@@ -53,6 +53,8 @@
- 
- flag bytestring--LT-0_10_4
-   description: [bytestring](https://hackage.haskell.org/haskell/package/bytestring) < 0.10.4
-+  default: False
-+  manual: True
- 
- Library
-   default-language: Haskell2010
-
-Diff finished.  Tue Aug  6 02:57:59 2019
diff --git a/ghc-cassava.spec b/ghc-cassava.spec
index 89b5b66..b3ab524 100644
--- a/ghc-cassava.spec
+++ b/ghc-cassava.spec
@@ -14,7 +14,6 @@ Url:            https://hackage.haskell.org/package/%{pkg_name}
 # Begin cabal-rpm sources:
 Source0:        https://hackage.haskell.org/package/%{pkgver}/%{pkgver}.tar.gz
 # End cabal-rpm sources
-Patch1:         cassava-bytestring.patch
 
 # Begin cabal-rpm deps:
 BuildRequires:  ghc-Cabal-devel
@@ -93,7 +92,6 @@ This package provides the Haskell %{pkg_name} profiling library.
 # Begin cabal-rpm setup:
 %setup -q -n %{pkgver}
 # End cabal-rpm setup
-%patch1 -p1 -b .orig1
 cabal-tweak-drop-dep bytestring-builder