diff --git a/rpm-ostree.spec b/rpm-ostree.spec
index f3b298a..6c71eac 100644
--- a/rpm-ostree.spec
+++ b/rpm-ostree.spec
@@ -9,11 +9,6 @@ Source0: rpm-ostree-%{version}.tar.xz
 License: LGPLv2+
 URL: https://github.com/projectatomic/rpm-ostree
 
-%if !%{defined rust_arches}
-# It's not defined yet in the base CentOS7 root
-%define rust_arches x86_64 i686 armv7hl aarch64 ppc64 ppc64le s390x
-%endif # defined rust_arches
-
 ExclusiveArch: %{rust_arches}
 
 %if 0%{?fedora}