diff --git a/zshrc b/zshrc
index 3b02bdb..872b6d1 100644
--- a/zshrc
+++ b/zshrc
@@ -207,7 +207,14 @@ if which fossil &>/dev/null; then
 	alias fsl="fossil"
 
 	fsld() {
-		fossil diff -N "$@" | colordiff | less -FRX
+		if which colordiff &>/dev/null; then
+			fossil diff -N "$@" | colordiff | less -FRX
+		else
+			fossil diff -N "$@" |
+				sed "s/^+.*$/$(tput setaf 2)&$(tput sgr0)/" |
+				sed "s/^-.*$/$(tput setaf 1)&$(tput sgr0)/" |
+				less -FRX
+		fi
 	}
 fi