diff --git a/acconfig.h b/acconfig.h
index df574a3c..eec275b5 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -7,7 +7,6 @@
 #undef HAVE_GC_H
 #undef HAVE_GC_GC_H
 #undef USE_GC
-#undef HAVE_GLIB2
 
 /* macros/curses checks */
 #undef HAS_CURSES
@@ -27,9 +26,6 @@
 /* terminfo/termcap */
 #undef HAVE_TERMINFO
 
-/* If set to 64, enables 64bit off_t for some systems (eg. Linux, Solaris) */
-#undef _FILE_OFFSET_BITS
-
 /* What type should be used for uoff_t */
 #undef UOFF_T_INT
 #undef UOFF_T_LONG