diff --git a/src/main/resources/reference.conf b/src/main/resources/reference.conf
index 232b759dc2..d0bf6a74ce 100644
--- a/src/main/resources/reference.conf
+++ b/src/main/resources/reference.conf
@@ -100,8 +100,10 @@ opencomputers {
       # run in a low-priority worker thread, this should be barely noticeable.
       activeGC: true
 
-      # The sizes of the three tiers of RAM, in kilobytes. This list must
-      # contain exactly five entries, or it will be ignored.
+      # The sizes of the five levels of RAM, in kilobytes. This list must
+      # contain exactly five entries, or it will be ignored. Note that while
+      # there are five levels of RAM, they still fall into the three tiers of
+      # items (level 1 = tier 1, level 2, 3 = tier 2, level 4, 5 = tier 3).
       ramSizes: [
         64
         128