diff --git a/libguestfs.spec b/libguestfs.spec
index 3c714b5..ce9ce35 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -61,7 +61,7 @@ Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
 Version:       1.45.6
-Release:       3%{?dist}
+Release:       4%{?dist}
 License:       LGPLv2+
 
 # Build only for architectures that have a kernel
@@ -764,6 +764,7 @@ fi
 %endif
   PYTHON=%{__python3} \
   --with-default-backend=libvirt \
+  --enable-appliance-format-auto \
 %if !0%{?rhel}
   --with-extra="fedora=%{fedora},release=%{release},libvirt" \
 %else
@@ -1126,6 +1127,9 @@ rm ocaml/html/.gitignore
 
 
 %changelog
+* Thu Jun  3 2021 Richard W.M. Jones <rjones@redhat.com> - 1:1.45.6-4
+- Add --enable-appliance-format-auto (RHBZ#1967166)
+
 * Wed Jun  2 2021 Richard W.M. Jones <rjones@redhat.com> - 1:1.45.6-3
 - Add gating tests (for RHEL 9)