diff --git a/acconfig.h b/acconfig.h
index 9685fccb68..3e8bb34a8c 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -34,11 +34,6 @@
 /* is guile available */
 #undef HAVE_GUILE
 
-/* Guile version number. Needed because guile < 1.6 doesn't provide this. */
-#undef GNC_GUILE_MAJOR_VERSION
-#undef GNC_GUILE_MINOR_VERSION
-#undef GNC_GUILE_MICRO_VERSION
-
 /* New or old Guile Smob for G-wrap */
 #undef GWRAP_OLD_GUILE_SMOB