diff --git a/diffconf.sh b/diffconf.sh
index ddba4b8..eff5570 100644
--- a/diffconf.sh
+++ b/diffconf.sh
@@ -2,7 +2,7 @@
 
 case "$1" in
     -c | --interactive-color)
-        ! diff -qsi "^COLOR.*none" /etc/DIFF_COLORS
+        ! grep -qsi "^COLOR.*none" /etc/DIFF_COLORS
         ;;
     *)
         echo >&2 "Invalid / no option passed, so far only -c | --interactive-color is supported."