diff --git a/motif.spec b/motif.spec
index 083946b..8dab8a5 100644
--- a/motif.spec
+++ b/motif.spec
@@ -15,10 +15,10 @@ Requires: xorg-x11-xinit
 BuildRequires: automake, libtool, autoconf, flex
 # flex static libs have been part of flex for RHEL <= 6 and Fedora <= 12
 %if 0%{?fedora} > 17 || 0%{?rhel} > 6
-BuildRequires: flex-devel%{?_isa}
+BuildRequires: flex-devel
 %endif
 %if 0%{?fedora} > 12 && 0%{?fedora} <= 17
-BuildRequires: flex-static%{?_isa}
+BuildRequires: flex-static
 %endif
 BuildRequires: byacc, pkgconfig
 BuildRequires: libjpeg-devel libpng-devel