diff --git a/configure b/configure
index 8b5d8ac34f..18686c8729 100755
--- a/configure
+++ b/configure
@@ -623,6 +623,9 @@ apply(){
     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
 }
 
+# CONFIG_LIST contains configurable options, while HAVE_LIST is for
+# system-dependent things.
+
 COMPONENT_LIST="
     bsfs
     decoders