diff --git a/mono-core.changes b/mono-core.changes
index 8a6ea1d..0ea60c8 100644
--- a/mono-core.changes
+++ b/mono-core.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Apr  2 16:40:19 UTC 2010 - aj@suse.de
+
+- Add dependency on unzip for monodoc-core to allow build-compare to work.
+
 -------------------------------------------------------------------
 Tue Mar  2 20:12:24 UTC 2010 - ajorgensen@novell.com
 
diff --git a/mono-core.spec b/mono-core.spec
index 149c41a..96050c5 100644
--- a/mono-core.spec
+++ b/mono-core.spec
@@ -25,7 +25,7 @@ Group:          Development/Languages/Mono
 Summary:        A .NET Runtime Environment
 Url:            http://go-mono.org/
 Version:        2.6.3
-Release:        2
+Release:        3
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Source0:        mono-%{version}.tar.bz2
 ExclusiveArch:  %ix86 x86_64 ppc ppc64 hppa armv4l sparc s390 ia64 s390x
@@ -1148,6 +1148,8 @@ Summary:        Monodoc - Documentation tools for C# code
 Group:          Development/Tools/Other
 Provides:       monodoc
 Obsoletes:      monodoc
+# Added to uncompress and compare documentation used by build-compare
+Requires:       unzip
 
 %description -n monodoc-core
 Monodoc-core contains documentation tools for C#.