diff --git a/argon2.spec b/argon2.spec
index d9e770d..70a2b12 100644
--- a/argon2.spec
+++ b/argon2.spec
@@ -28,6 +28,7 @@ Url:            https://github.com/P-H-C/phc-winner-argon2
 Source:         https://github.com/P-H-C/phc-winner-argon2/archive/%{_version}.tar.gz#/phc-winner-argon2-%{_version}.tar.gz
 Patch1:         optflags.patch
 BuildRequires:  sed
+ExclusiveArch:  i686 x86_64
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description