1 files changed, 1 insertions, 1 deletions
diff --git a/Day15.cs b/Day15.cs
index 5195511..367b1fc 100644
--- a/Day15.cs
+++ b/Day15.cs
@@ -8,7 +8,7 @@ namespace aoc2019
     internal sealed class Day15 : Day
     {
         private readonly IntCodeVM vm;
-        private bool verbose = false;
+        private readonly bool verbose = false;
 
         public Day15()
         {