diff -ur -x '*Po' pingus-0.6.0.orig/src/blitter.cxx pingus-0.6.0/src/blitter.cxx
--- pingus-0.6.0.orig/src/blitter.cxx	2003-09-10 01:01:17.022128512 -0400
+++ pingus-0.6.0/src/blitter.cxx	2003-09-10 01:09:43.097193408 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <config.h>
 #include <stdio.h>
 #include "pingus_error.hxx"
diff -ur -x '*Po' pingus-0.6.0.orig/src/col_map.cxx pingus-0.6.0/src/col_map.cxx
--- pingus-0.6.0.orig/src/col_map.cxx	2003-09-10 01:01:17.054123648 -0400
+++ pingus-0.6.0/src/col_map.cxx	2003-09-10 01:10:52.076706928 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <iostream>
 #include <ClanLib/Display/SurfaceProviders/canvas.h>
 #include "gui/graphic_context.hxx"
diff -ur -x '*Po' pingus-0.6.0.orig/src/console.cxx pingus-0.6.0/src/console.cxx
--- pingus-0.6.0.orig/src/console.cxx	2003-09-10 01:01:17.025128056 -0400
+++ pingus-0.6.0/src/console.cxx	2003-09-10 01:11:17.323868776 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <config.h>
 #include <ClanLib/Display/Display/display.h>
 #include <ClanLib/Display/Font/font.h>
diff -ur -x '*Po' pingus-0.6.0.orig/src/demo_recorder.cxx pingus-0.6.0/src/demo_recorder.cxx
--- pingus-0.6.0.orig/src/demo_recorder.cxx	2003-09-10 01:01:17.049124408 -0400
+++ pingus-0.6.0/src/demo_recorder.cxx	2003-09-10 01:11:50.095886672 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <time.h>
 #include <iostream>
 #include "system.hxx"
diff -ur -x '*Po' pingus-0.6.0.orig/src/editor/generic_property_frame.cxx pingus-0.6.0/src/editor/generic_property_frame.cxx
--- pingus-0.6.0.orig/src/editor/generic_property_frame.cxx	2003-09-10 01:01:17.028127600 -0400
+++ pingus-0.6.0/src/editor/generic_property_frame.cxx	2003-09-10 01:01:47.907433232 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <iostream>
 #include <ClanLib/GUI/label.h>
 #include <ClanLib/GUI/inputbox.h>
diff -ur -x '*Po' pingus-0.6.0.orig/src/gui/root_gui_manager.cxx pingus-0.6.0/src/gui/root_gui_manager.cxx
--- pingus-0.6.0.orig/src/gui/root_gui_manager.cxx	2003-09-10 01:01:17.002131552 -0400
+++ pingus-0.6.0/src/gui/root_gui_manager.cxx	2003-09-10 01:04:11.164654824 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include "root_gui_manager.hxx"
 #include "../input/controller.hxx"
 
diff -ur -x '*Po' pingus-0.6.0.orig/src/pingu_holder.cxx pingus-0.6.0/src/pingu_holder.cxx
--- pingus-0.6.0.orig/src/pingu_holder.cxx	2003-09-10 01:01:17.054123648 -0400
+++ pingus-0.6.0/src/pingu_holder.cxx	2003-09-10 01:13:48.283919360 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <iostream>
 #include "pingu_holder.hxx"
 #include "pingu.hxx"
diff -ur -x '*Po' pingus-0.6.0.orig/src/savegame_manager.cxx pingus-0.6.0/src/savegame_manager.cxx
--- pingus-0.6.0.orig/src/savegame_manager.cxx	2003-09-10 01:01:17.035126536 -0400
+++ pingus-0.6.0/src/savegame_manager.cxx	2003-09-10 01:15:43.254441184 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <iostream>
 #include <fstream>
 #include "system.hxx"
diff -ur -x '*Po' pingus-0.6.0.orig/src/worldmap/dot.cxx pingus-0.6.0/src/worldmap/dot.cxx
--- pingus-0.6.0.orig/src/worldmap/dot.cxx	2003-09-10 01:01:17.036126384 -0400
+++ pingus-0.6.0/src/worldmap/dot.cxx	2003-09-10 01:06:29.392640976 -0400
@@ -17,6 +17,7 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <assert.h>
 #include <iostream>
 #include "../xml_file_reader.hxx"
 #include "dot.hxx"
diff -ur -x '*Po' pingus-0.6.0.orig/src/worldmap/graph.hxx pingus-0.6.0/src/worldmap/graph.hxx
--- pingus-0.6.0.orig/src/worldmap/graph.hxx	2003-09-10 01:01:17.037126232 -0400
+++ pingus-0.6.0/src/worldmap/graph.hxx	2003-09-10 01:07:31.004274584 -0400
@@ -20,6 +20,7 @@
 #ifndef HEADER_GRAPH_HXX
 #define HEADER_GRAPH_HXX
 
+#include <assert.h>
 #include <algorithm>
 #include <vector>