Index: KoboDeluxe-0.5.1/configure.in
===================================================================
--- KoboDeluxe-0.5.1.orig/configure.in	2008-02-10 12:27:11.000000000 +0100
+++ KoboDeluxe-0.5.1/configure.in	2008-02-10 15:50:11.000000000 +0100
@@ -159,7 +159,6 @@
 )
 LIBS="$LIBS -lSDL_image"
 
-
 dnl-------------------------------------------------------
 dnl Checks for OpenGL
 dnl-------------------------------------------------------
@@ -214,13 +213,18 @@
 dnl-------------------------------------------------------
 dnl Checks for library functions.
 dnl-------------------------------------------------------
+dnl SDL_putenv may not be available in all SDL ports
+AC_CHECK_DECLS(SDL_putenv,,,[#include <SDL.h>])
+
 AC_CHECK_FUNCS(strdup strstr strchr strrchr)
 AC_CHECK_FUNCS(snprintf _snprintf vsnprintf _vsnprintf)
 AC_CHECK_FUNCS(pow sqrt)
 AC_CHECK_FUNCS(munmap mkdir select stat)
 AC_CHECK_FUNCS(atexit floor memmove memset memcmp)
-AC_CHECK_FUNCS(gettimeofday)
+AC_CHECK_FUNCS(gettimeofday putenv)
 AC_CHECK_FUNCS(getegid setgid)
+
+
 AC_FUNC_MEMCMP
 AC_FUNC_STRTOD
 AC_FUNC_VPRINTF
Index: KoboDeluxe-0.5.1/graphics/gfxengine.cpp
===================================================================
--- KoboDeluxe-0.5.1.orig/graphics/gfxengine.cpp	2008-02-10 12:41:31.000000000 +0100
+++ KoboDeluxe-0.5.1/graphics/gfxengine.cpp	2008-02-10 15:58:06.000000000 +0100
@@ -21,10 +21,15 @@
 
 #define	DBG(x)	x
 
+#include <aconfig.h>
+
 #include "logger.h"
 
 #include <string.h>
 #include <math.h>
+#if not (HAVE_DECL_SDL_PUTENV) and defined (HAVE_PUTENV)
+#include <stdlib.h>
+#endif
 
 #include "gfxengine.h"
 #include "filters.h"
@@ -764,8 +769,14 @@
 	if(is_showing)
 		return 0;
 
-	if(_centered && !_fullscreen)
-		SDL_putenv((char *)"SDL_VIDEO_CENTERED=1");
+  if(_centered && !_fullscreen)
+#if HAVE_DECL_SDL_PUTENV
+    SDL_putenv("SDL_VIDEO_CENTERED=1");
+#elif defined(HAVE_PUTENV)
+    putenv("SDL_VIDEO_CENTERED=1");
+#else
+    #error Neither SDL_putenv() nor putenv() are available. Fix it!
+#endif
 
 	log_printf(DLOG, "Opening screen...\n");
 	if(!SDL_WasInit(SDL_INIT_VIDEO))