diff --git a/tix.changes b/tix.changes
index b6f3832..f37b8af 100644
--- a/tix.changes
+++ b/tix.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Jun 20 14:42:27 UTC 2013 - max@suse.com
+
+- Fix build with Tcl 8.6.0.
+- Cleanup spec file.
+
 -------------------------------------------------------------------
 Wed Dec 21 10:46:44 UTC 2011 - coolo@suse.com
 
diff --git a/tix.spec b/tix.spec
index 75763e7..3a709df 100644
--- a/tix.spec
+++ b/tix.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package tix
 #
-# Copyright (c) 2011 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -19,12 +19,8 @@
 Name:           tix
 BuildRequires:  autoconf
 BuildRequires:  fdupes
-BuildRequires:  itcl
 BuildRequires:  tk-devel
 BuildRequires:  xorg-x11-devel
-%define V_TIX   8.1.%tcl_version
-%define prefix	/usr
-%define mandir  /usr/share/man
 Version:        8.4.3
 Release:        0
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
@@ -34,7 +30,7 @@ Group:          Development/Libraries/Tcl
 Source:         Tix%version-src.tar.bz2
 Patch0:         %name.patch
 Summary:        Tools for tk
-Provides:       tixwish tixwish%V_TIX
+Group:          Development/Libraries/Tcl
 
 %description
 The Tix library has, by far, the greatest collection of widgets for
@@ -54,19 +50,14 @@ find docs -type f | xargs chmod a-x
 
 %build
 autoreconf
-export CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing"
-./configure \
+export CFLAGS="$RPM_OPT_FLAGS -DUSE_INTERP_RESULT -fno-strict-aliasing"
+%configure \
 	--with-tcl=%_libdir \
-	--with-tk=%_libdir \
-	--prefix=%_prefix \
-	--libdir=%_libdir \
-	--mandir=%_mandir
+	--with-tk=%_libdir
 make
 
 %install
-make install \
-	DESTDIR=%buildroot \
-	libdir=%_libdir/tcl
+make install DESTDIR=%buildroot libdir=%_libdir/tcl
 MANN=%buildroot/%_mandir/mann
 mkdir -p $MANN
 pushd man
@@ -75,9 +66,6 @@ for f in *.n; do
 done
 popd
 
-%clean
-rm -rf %buildroot
-
 %files
 %defattr(-,root,root)
 %doc ABOUT* README* ChangeLog license.terms index.html