diff --git a/legacy/firmware/.gitignore b/legacy/firmware/.gitignore
index da8ec7c15..543117bf3 100644
--- a/legacy/firmware/.gitignore
+++ b/legacy/firmware/.gitignore
@@ -2,5 +2,6 @@ coin_info.[ch]
 nem_mosaics.[ch]
 ethereum_networks.h
 ethereum_tokens.[ch]
+u2f_knownapps.h
 
 bl_data.h