diff --git a/ghc-network-byte-order.changes b/ghc-network-byte-order.changes
index 03d356d..3a0202b 100644
--- a/ghc-network-byte-order.changes
+++ b/ghc-network-byte-order.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Oct 17 12:20:00 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+ 
+- force i686 arch on i586
+ 
 -------------------------------------------------------------------
 Tue Sep 29 02:00:53 UTC 2020 - psimons@suse.com
 
diff --git a/ghc-network-byte-order.spec b/ghc-network-byte-order.spec
index ab80cf8..9830223 100644
--- a/ghc-network-byte-order.spec
+++ b/ghc-network-byte-order.spec
@@ -28,6 +28,12 @@ Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-bytestring-devel
 BuildRequires:  ghc-rpm-macros
+# GHC dont support i586
+%ifarch %{ix86}
+ExclusiveArch:  i586 i686
+ExclusiveArch:  i686
+%{expand:%%global optflags %(echo "%{optflags}"|sed -e s/i586/i686/) -march=i686 -mtune=generic}
+%endif
 %if %{with tests}
 BuildRequires:  ghc-doctest-devel
 %endif