diff --git a/.gitignore b/.gitignore
index 6b7c3e6a4d..ee9b9a5f8f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,3 +55,7 @@ bitmaps_png/png*
 bitmaps_png/tmp
 common/pcb_keywords.cpp
 include/pcb_lexer.h
+
+# demo project auxillary files
+demos/**/*-bak
+demos/**/_autosave-*