diff --git a/ghc-ghc-lib-parser-ex.changes b/ghc-ghc-lib-parser-ex.changes
index 6ae4132..89e77d3 100644
--- a/ghc-ghc-lib-parser-ex.changes
+++ b/ghc-ghc-lib-parser-ex.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Oct 17 12:20:00 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+ 
+- force i686 arch on i586
+ 
 -------------------------------------------------------------------
 Wed Aug 19 07:30:38 UTC 2020 - Michel Normand <normand@linux.vnet.ibm.com>
 
diff --git a/ghc-ghc-lib-parser-ex.spec b/ghc-ghc-lib-parser-ex.spec
index 781b707..42a6d3a 100644
--- a/ghc-ghc-lib-parser-ex.spec
+++ b/ghc-ghc-lib-parser-ex.spec
@@ -33,6 +33,12 @@ BuildRequires:  ghc-ghc-boot-th-devel
 BuildRequires:  ghc-ghc-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  ghc-uniplate-devel
+# 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-directory-devel
 BuildRequires:  ghc-extra-devel