diff --git a/css/knacss.css b/css/knacss.css
index 59578d7..b89697c 100644
--- a/css/knacss.css
+++ b/css/knacss.css
@@ -1,5 +1,5 @@
 /*
-* www.KNACSS.com V2.7b (2013-08) @author: Raphael Goetter, Alsacreations
+* www.KNACSS.com V2.7 (2013-08) @author: Raphael Goetter, Alsacreations
 * Licence CC-BY http://creativecommons.org/licenses/by/3.0/fr/ 
 */
 
@@ -439,6 +439,12 @@ source https://github.com/stubbornella/oocss/blob/master/core/spacing/space.css
 	}
 }
 
+/* debug helper */
+.knacss-debug {
+	background: pink;
+	outline: 3px solid maroon;
+}
+
 /* orientation iOS font-size fix */
 @media (orientation: landscape) and (max-device-width: 768px) {
 	html,
diff --git a/less/knacss.less b/less/knacss.less
index db0f0ce..9d245bb 100644
--- a/less/knacss.less
+++ b/less/knacss.less
@@ -647,6 +647,12 @@ input[type='submit']::-moz-focus-inner {
 	}
 }
 
+/* debug helper */
+.knacss-debug {
+	background: pink;
+	outline: 3px solid maroon;
+}
+
 /* ----------------------------- */
 /* ==own stylesheet               */
 /* ----------------------------- */