Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -9,11 +9,11 @@ AM_PROG_CC_STDC
 AC_HEADER_STDC
 AC_PROG_RANLIB
 
-PKG_CHECK_MODULES(ZAZ, [sdl vorbis vorbisfile theoraenc theoradec])
+PKG_CHECK_MODULES(ZAZ, [sdl vorbis vorbisfile vorbis ogg theoraenc theoradec])
 PKG_CHECK_MODULES(FTGL, ftgl >= 2.1.3)
 
 AC_CHECK_LIB(SDL_image, IMG_Load, [], AC_MSG_ERROR(no SDL_image found))
-AC_CHECK_LIB(vorbisenc, vorbis_encode_init, [], AC_MSG_ERROR(no vorbisenc found))
+AC_CHECK_LIB(vorbisenc, vorbis_encode_init, [], AC_MSG_ERROR(no vorbisenc found), -logg -lvorbis)
 AC_CHECK_LIB(GL, main, [], AC_MSG_ERROR([OpenGL library not found.]))
 
 AC_CHECK_HEADER(GL/gl.h, [], AC_MSG_ERROR(no GL/gl.h found))
