diff --git a/zshrc b/zshrc
index 872b6d1..a0b5248 100644
--- a/zshrc
+++ b/zshrc
@@ -210,10 +210,11 @@ if which fossil &>/dev/null; then
 		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
+			red="$(tput setaf 1)"
+			green="$(tput setaf 2)"
+			reset="$(tput sgr0)"
+			fossil diff -N "$@" | sed "s/^+.*$/$green&$reset/" |
+				sed "s/^-.*$/$red&$reset/" | less -FRX
 		fi
 	}
 fi