diff --git a/.gitignore b/.gitignore
index 2dac990..e74bbc2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,6 @@ bestell
 firmware/doc/html
 firmware/doc/latex
 firmware/doc/doxygen_sqlite3.db
+
+# synth generated header file
+synth/tune.h