diff --git a/libguestfs.spec b/libguestfs.spec
index 577e7c4..87fa061 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -40,7 +40,7 @@ Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
 Version:       1.39.6
-Release:       8%{?dist}
+Release:       9%{?dist}
 License:       LGPLv2+
 
 # Source and patches.
@@ -613,6 +613,9 @@ Requires:      unzip
 Requires:      curl
 Requires:      /usr/bin/virsh
 
+# -it vddk and -o rhv-upload need nbdkit.
+Recommends:    nbdkit, nbdkit-plugin-python3
+
 # For rhsrvany.exe, used to install firstboot scripts in Windows guests.
 Requires:      mingw32-srvany >= 1.0-13
 
@@ -1400,6 +1403,9 @@ install -m 0644 utils/boot-benchmark/boot-benchmark.1 $RPM_BUILD_ROOT%{_mandir}/
 
 
 %changelog
+* Fri Jul 13 2018 Richard W.M. Jones <rjones@redhat.com> - 1:1.39.6-10
+- v2v: Recommends nbdkit and the Python 3 plugin.
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1:1.39.6-8
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild