diff --git a/ghc-dotgen.changes b/ghc-dotgen.changes
index 30655b2..33533e7 100644
--- a/ghc-dotgen.changes
+++ b/ghc-dotgen.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 Aug 18 10:44:42 UTC 2020 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-dotgen.spec b/ghc-dotgen.spec
index b8c58ef..ce44fd6 100644
--- a/ghc-dotgen.spec
+++ b/ghc-dotgen.spec
@@ -27,6 +27,12 @@ Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-containers-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
 
 %description
 This package provides a simple interface for building .dot graph files, for