diff --git a/ghc-base64-bytestring-type.changes b/ghc-base64-bytestring-type.changes
index ab2873b..88e57bc 100644
--- a/ghc-base64-bytestring-type.changes
+++ b/ghc-base64-bytestring-type.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 Nov  3 10:09:07 UTC 2020 - psimons@suse.com
 
diff --git a/ghc-base64-bytestring-type.spec b/ghc-base64-bytestring-type.spec
index 8c608cd..d1757e4 100644
--- a/ghc-base64-bytestring-type.spec
+++ b/ghc-base64-bytestring-type.spec
@@ -40,6 +40,12 @@ BuildRequires:  ghc-http-api-data-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  ghc-serialise-devel
 BuildRequires:  ghc-text-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-tasty-devel
 BuildRequires:  ghc-tasty-quickcheck-devel