diff --git a/tcl.spec b/tcl.spec
index 8f17ae5..30dfbfe 100644
--- a/tcl.spec
+++ b/tcl.spec
@@ -5,13 +5,14 @@
 Summary: Tool Command Language, pronounced tickle
 Name: tcl
 Version: %{vers}
-Release: 3%{?dist}
+Release: 4%{?dist}
 Epoch: 1
 License: TCL
 Group: Development/Languages
 URL: http://tcl.sourceforge.net/
 Source0: http://downloads.sourceforge.net/sourceforge/tcl/tcl-core%{version}-src.tar.gz
 Buildrequires: autoconf
+BuildRequires: zlib-devel
 Provides: tcl(abi) = %{majorver}
 Obsoletes: tcl-tcldict <= %{vers}
 Provides: tcl-tcldict = %{vers}
@@ -50,6 +51,7 @@ The package contains the development files and man pages for tcl.
 
 %prep
 %setup -q -n %{name}%{version}
+rm -r compat/zlib
 chmod -x generic/tclStrToD.c
 
 %patch0 -p1 -b .autopath
@@ -134,6 +136,9 @@ rm -rf %{buildroot}/%{_datadir}/%{name}%{majorver}/ldAix
 %{_datadir}/%{name}%{majorver}/tclAppInit.c
 
 %changelog
+* Mon Jun  2 2014 Ville Skyttä <ville.skytta@iki.fi> - 1:8.6.1-4
+- Use system zlib instead of bundled one
+
 * Tue May 20 2014 Jaroslav Škarvada <jskarvad@redhat.com> - 1:8.6.1-3
 - Fixed TCL_PACKAGE_PATH to point to tcl8.6