diff --git a/mono-core.changes b/mono-core.changes
index 6e61fac..615f5fc 100644
--- a/mono-core.changes
+++ b/mono-core.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Apr  5 11:08:38 CEST 2007 - aj@suse.de
+
+- Add zlib-devel to BuildRequires.
+
 -------------------------------------------------------------------
 Thu Mar 29 13:39:36 CEST 2007 - aj@suse.de
 
diff --git a/mono-core.spec b/mono-core.spec
index e75f294..1c44a39 100644
--- a/mono-core.spec
+++ b/mono-core.spec
@@ -11,13 +11,13 @@
 # norootforbuild
 
 Name:           mono-core
-BuildRequires:  bc bison glib2-devel
+BuildRequires:  bc bison glib2-devel zlib-devel
 License:        GNU Library General Public License v. 2.0 and 2.1 (LGPL)
 Group:          Development/Languages/Other
 Summary:        A .NET Runtime Environment
 URL:            http://go-mono.org/
 Version:        1.2.3.1
-Release:        5
+Release:        7
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Source0:        mono-%{version}.tar.gz
 # kdepatch patch won't work with the new relocatable Mono (Miguel)
@@ -947,6 +947,8 @@ rm -f ./usr/share/man/man1/httpcfg.1
 rm -rf ${RPM_BUILD_ROOT}
 
 %changelog
+* Thu Apr 05 2007 - aj@suse.de
+- Add zlib-devel to BuildRequires.
 * Thu Mar 29 2007 - aj@suse.de
 - Add bison to BuildRequires.
 * Tue Mar 06 2007 - wberrier@suse.de