diff --git a/nbdkit.spec b/nbdkit.spec
index cf4dc2e..b0c468a 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -1,8 +1,6 @@
 %global _hardened_build 1
 
-# Broken on {power64} because of
-# https://bugzilla.redhat.com/show_bug.cgi?id=1778520
-%ifarch aarch64 %{arm} x86_64 ppc
+%ifarch %{kernel_arches}
 %global have_libguestfs 1
 %endif
 
@@ -1068,6 +1066,9 @@ export LIBGUESTFS_TRACE=1
 
 
 %changelog
+* Mon Aug 10 2020 Merlin Mathesius <mmathesi@redhat.com> - 1.21.23-1
+- Use ExclusiveArch: %%{kernel_arches}
+
 * Sat Aug  8 2020 Richard W.M. Jones <rjones@redhat.com> - 1.21.23-1
 - New upstream version 1.21.23.