diff --git a/.gitignore b/.gitignore
index d5f5d2b..5ea8dad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,19 +1,27 @@
 Makefile.in
 Makefile
 aclocal.m4
 config.guess
 config.log
 config.status
 config.sub
 configure
 depcomp
 install-sh
 missing
 src/.deps
 src/Makefile.in
 src/b_config.h.in
 src/b_config.h
 src/booth_config.h
 src/boothd
 src/stamp-h1
 src/stamp-h2
+
+# cscope files
+cscope.*
+ncscope.*
+
+# ctags files
+tags
+