diff --git a/internal/2015/register.go b/internal/2015/register.go
index 56e6240..db0cdcd 100644
--- a/internal/2015/register.go
+++ b/internal/2015/register.go
@@ -11,5 +11,6 @@ import (
 	_ "advent-of-code/internal/2015/DaySix"
 	_ "advent-of-code/internal/2015/DayTen"
 	_ "advent-of-code/internal/2015/DayThree"
+	_ "advent-of-code/internal/2015/DayTwelve"
 	_ "advent-of-code/internal/2015/DayTwo"
 )