diff --git a/ghc-network-multicast.changes b/ghc-network-multicast.changes
index 1dcbc7c..2d41bad 100644
--- a/ghc-network-multicast.changes
+++ b/ghc-network-multicast.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 10:45:34 UTC 2020 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-network-multicast.spec b/ghc-network-multicast.spec
index 66af7b8..d0ae691 100644
--- a/ghc-network-multicast.spec
+++ b/ghc-network-multicast.spec
@@ -28,6 +28,12 @@ BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-network-bsd-devel
 BuildRequires:  ghc-network-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
 The "Network.Multicast" module is for sending UDP datagrams over multicast