diff --git a/ghc-ed25519.changes b/ghc-ed25519.changes
index 3a60aec..338c8a6 100644
--- a/ghc-ed25519.changes
+++ b/ghc-ed25519.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Oct 17 12:20:00 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+ 
+- force i686 arch on i586
+ 
 -------------------------------------------------------------------
 Mon Aug 31 09:34:31 UTC 2020 - psimons@suse.com
 
diff --git a/ghc-ed25519.spec b/ghc-ed25519.spec
index bf06f83..dcf6545 100644
--- a/ghc-ed25519.spec
+++ b/ghc-ed25519.spec
@@ -29,6 +29,12 @@ Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revis
 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-QuickCheck-devel
 BuildRequires:  ghc-directory-devel