diff --git a/fish/config.fish b/fish/config.fish
index 9910a8c..3f34e48 100644
--- a/fish/config.fish
+++ b/fish/config.fish
@@ -23,6 +23,7 @@ set -g fish_color_valid_path normal
 set -g fish_color_vcs 43d696
 set -g fish_color_vcs_braces 29bc7d
 
+set -g _fish_abbr_fsl fossil
 set -g _fish_abbr_gpg gpg2
 set -g _fish_abbr_vi vim
 
diff --git a/fish/functions/fsld.fish b/fish/functions/fsld.fish
new file mode 100644
index 0000000..6071062
--- /dev/null
+++ b/fish/functions/fsld.fish
@@ -0,0 +1,3 @@
+function fsld
+    fossil diff $argv | colordiff | less -FRX
+end