diff --git a/.gitignore b/.gitignore
index 91e98f2..7143601 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@ GNUmakefile.in
 /config/m4/ltsugar.m4
 /config/m4/ltversion.m4
 /config/m4/lt~obsolete.m4
+/isobusfs/.dirstamp
 /mcp251xfd/.dirstamp
 
 /asc2log