diff --git a/2020/day2/vhdl/.gitignore b/2020/day2/vhdl/.gitignore
index 6d765d9..3f1310c 100644
--- a/2020/day2/vhdl/.gitignore
+++ b/2020/day2/vhdl/.gitignore
@@ -2,3 +2,4 @@ workdir/
 *.o
 *.ghw
 sim
+top_syn.vhd