diff --git a/Config.h b/Config.h
index 73001694a..22882b6c2 100644
--- a/Config.h
+++ b/Config.h
@@ -304,9 +304,11 @@
 // Nothing beyond this point should ever be touched by 
 // mere mortals so leave this stuff alone.
 //
+#if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
 #ifdef BB_FEATURE_MOUNT_MTAB_SUPPORT
 #define BB_MTAB
 #endif
+#endif
 //
 #if defined BB_FEATURE_SH_COMMAND_EDITING && defined BB_SH
 #define BB_CMDEDIT