diff --git a/ghc-mwc-random.changes b/ghc-mwc-random.changes
index dd590dd..a33f749 100644
--- a/ghc-mwc-random.changes
+++ b/ghc-mwc-random.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 10:45:31 UTC 2020 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-mwc-random.spec b/ghc-mwc-random.spec
index bfe7359..96754f9 100644
--- a/ghc-mwc-random.spec
+++ b/ghc-mwc-random.spec
@@ -30,6 +30,12 @@ BuildRequires:  ghc-primitive-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  ghc-time-devel
 BuildRequires:  ghc-vector-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
 
 %description
 This package contains code for generating high quality random numbers that