diff --git a/mupdf.spec b/mupdf.spec
index b2fe3f7..4126bc4 100644
--- a/mupdf.spec
+++ b/mupdf.spec
@@ -38,6 +38,8 @@ BuildRequires:  xorg-x11-devel
 BuildRequires:  zlib-devel
 Requires:       xdg-utils
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
+#set ExclusiveArch:  %{ix86} x86_64 %{arm}. v8 is available only
+#  for those architectures 
 ExclusiveArch:  %{ix86} x86_64 %{arm}
 
 %description