diff --git a/ghc-crypto-api.changes b/ghc-crypto-api.changes
index fbb7ee9..b1eda26 100644
--- a/ghc-crypto-api.changes
+++ b/ghc-crypto-api.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Oct 17 12:20:00 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+ 
+- force i686 arch on i586
+ 
 -------------------------------------------------------------------
 Mon Aug 31 09:34:36 UTC 2020 - psimons@suse.com
 
diff --git a/ghc-crypto-api.spec b/ghc-crypto-api.spec
index f204214..bb85350 100644
--- a/ghc-crypto-api.spec
+++ b/ghc-crypto-api.spec
@@ -32,6 +32,12 @@ BuildRequires:  ghc-entropy-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  ghc-tagged-devel
 BuildRequires:  ghc-transformers-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
 A generic interface for cryptographic operations (hashes, ciphers, randomness).