diff --git a/nbdkit.spec b/nbdkit.spec
index ee28bd2..86bd254 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -2,7 +2,7 @@
 
 Name:           nbdkit
 Version:        1.1.2
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        NBD server
 
 License:        BSD
@@ -139,7 +139,11 @@ find $RPM_BUILD_ROOT -name '*.la' -delete
 
 
 %check
+%if 0%{?fedora} >= 19
+# libguestfs 1.20 in Fedora 18 doesn't support NBD client protocol, so
+# the tests cannot be run.
 make check
+%endif
 
 
 %files
@@ -195,8 +199,9 @@ make check
 
 
 %changelog
-* Tue Jul 16 2013 Richard W.M. Jones <rjones@redhat.com> - 1.1.2-1
+* Tue Jul 16 2013 Richard W.M. Jones <rjones@redhat.com> - 1.1.2-2
 - New development version 1.1.2.
+- Disable the tests on Fedora <= 18.
 
 * Tue Jun 25 2013 Richard W.M. Jones <rjones@redhat.com> - 1.1.1-1
 - New development version 1.1.1.