diff --git a/tuxracer.spec b/tuxracer.spec
index 402a4e4..32dd7e6 100644
--- a/tuxracer.spec
+++ b/tuxracer.spec
@@ -1,6 +1,6 @@
 Name:          tuxracer
 Version:       0.61
-Release:       4mamba
+Release:       5mamba
 Summary:       A simple OpenGL-based racing game featuring Tux
 Group:         Applications/Games
 Vendor:        openmamba
@@ -16,12 +16,26 @@ Patch1:        tuxracer-0.61-config.patch
 Patch2:        tuxracer-0.61-ia64.patch
 Patch3:        tuxracer-0.61-gcc33.patch
 License:       GPL
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libGL-devel
+BuildRequires: libGLU-devel
+BuildRequires: libICE-devel
+BuildRequires: libSDL-devel
+BuildRequires: libSDL_mixer-devel
+BuildRequires: libSM-devel
+BuildRequires: libX11-devel
+BuildRequires: libXext-devel
+BuildRequires: libXi-devel
+BuildRequires: libXmu-devel
+BuildRequires: libXt-devel
+BuildRequires: libgcc
+BuildRequires: libstdc++6-devel
+BuildRequires: libtcl-devel
+## AUTOBUILDREQ-END
 BuildRequires: libtcl-devel >= 8.4.7
 BuildRequires: libSDL_mixer-devel >= 1.2.5
 BuildRequires: libSDL-devel >= 1.2.7
-BuildRequires: libGL-devel
-BuildRequires: libICE-devel
-BuildRequires: libSM-devel
 BuildRequires: libogg-devel
 Obsoletes:     tuxracer-data
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
@@ -38,10 +52,11 @@ The object of the game is to slide down a snow- and ice-covered mountain as quic
 
 
 %build
+TCLVER=`pkg-config --modversion tcl | cut -d. -f1-2`
 CFLAGS="-DGLX_GLXEXT_LEGACY $RPM_OPT_FLAGS" \
 %configure \
    --with-data-dir=%{_datadir}/tuxracer \
-   --with-tcl-lib-name=tcl8.4
+   --with-tcl-lib-name=tcl${TCLVER}
 
    #--prefix=%{_prefix} \
    #--with-gl-inc=/usr/X11R6/include \
@@ -74,14 +89,18 @@ install -m 644 %{SOURCE3} %{buildroot}%{_datadir}/applications/tuxracer.desktop
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
 %files
-%defattr (-, root, root, 755)
+%defattr(-,root,root,755)
 %{_bindir}/tuxracer
 %dir %{_datadir}/tuxracer
 %{_datadir}/tuxracer/*
 %{_datadir}/applications/tuxracer.desktop
-%doc AUTHORS COPYING ChangeLog README contrib
+%doc AUTHORS COPYING
+#ChangeLog README contrib
 
 %changelog
+* Fri Sep 26 2014 Silvan Calarco <silvan.calarco@mambasoft.it> 0.61-5mamba
+- really rebuilt with libtcl 8.6
+
 * Tue Jul 02 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 0.61-4mamba
 - rebuilt with libtcl 8.6