diff --git a/configure.in b/configure.in
index 583d33393..65980d95f 100644
--- a/configure.in
+++ b/configure.in
@@ -34,6 +34,7 @@ AC_SEARCH_LIBS([FT_Load_Glyph], [freetype], [], AC_MSG_ERROR([Can't LÖVE withou
 AC_SEARCH_LIBS([PHYSFS_init], [physfs], [], AC_MSG_ERROR([Can't LÖVE without PhysicsFS]))
 AC_SEARCH_LIBS([ModPlug_Load], [modplug], [], AC_MSG_ERROR([Can't LÖVE without ModPlug]))
 AC_SEARCH_LIBS([mpg123_open_feed], [mpg123], [], AC_MSG_ERROR([Can't LÖVE without Mpg123]))
+AC_SEARCH_LIBS([mpg123_seek_64], [mpg123], AC_SUBST([FILE_OFFSET],[-D_FILE_OFFSET_BITS=64]), AC_SUBST([FILE_OFFSET],[]))
 AC_SEARCH_LIBS([ov_open], [vorbisfile], [], AC_MSG_ERROR([Can't LÖVE without VorbisFile]))
 AC_SEARCH_LIBS([FLAC__metadata_chain_new], [FLAC++], [], AC_MSG_ERROR([Can't LÖVE without FLAC++]))
 AC_CONFIG_FILES([
diff --git a/platform/unix/gen-makefile b/platform/unix/gen-makefile
index 7fa35de21..e75836f01 100644
--- a/platform/unix/gen-makefile
+++ b/platform/unix/gen-makefile
@@ -3,7 +3,7 @@ echo Generating src/Makefile.am ...
 cd src
 inc_current=.
 inc_modules="$inc_current/modules"
-echo "AM_CPPFLAGS = -I$inc_current -I$inc_modules -I/usr/include/AL -I/usr/include/freetype2  \$(INCLUDE_LUA) -I/usr/include/SDL
+echo "AM_CPPFLAGS = -I$inc_current -I$inc_modules -I/usr/include/AL -I/usr/include/freetype2  \$(INCLUDE_LUA) -I/usr/include/SDL \$(FILE_OFFSET)
 AUTOMAKE_OPTIONS = subdir-objects
 DEFAULT_INCLUDES =
 SUBDIRS =