diff --git a/day05/sol.py b/day05/sol.py
index 3d54e49..0700847 100644
--- a/day05/sol.py
+++ b/day05/sol.py
@@ -39,7 +39,7 @@ def solve(input):
                 break
         if found:
             #print("collapsing ({:,} {:,}) and ({:,} {:,}) -> ({:,} {:,})".format(x,y,lo,hi,min(x,lo),max(y,hi)))
-            # if x <= lo <= hi < y then the range is unchanged and we don't need to update flattened[i].
+            # if x <= lo <= hi <= y then the range is unchanged and we don't need to update flattened[i].
             # otherwise we need to add the new range to the queue to see if it can be merged with any other entries.
             if lo < x or hi > y:
                 del flattened[i]