diff --git a/dotfiles/global_gitignore b/dotfiles/global_gitignore
index e5327ba..ca50d2c 100644
--- a/dotfiles/global_gitignore
+++ b/dotfiles/global_gitignore
@@ -30,3 +30,8 @@ tramp
 
 # cask packages
 .cask/
+
+# Smex related files and folders
+/smex-items
+/.smex-items
+/smex-save-file
diff --git a/scripts/sysinstall/set_global_gitignore.sh b/scripts/sysinstall/set_global_gitignore.sh
new file mode 100644
index 0000000..adc8cbc
--- /dev/null
+++ b/scripts/sysinstall/set_global_gitignore.sh
@@ -0,0 +1 @@
+git config --global core.excludesfile '~/.global_gitignore'