diff --git a/config.h b/config.h
index 5a78470..3a53e18 100644
--- a/config.h
+++ b/config.h
@@ -50,7 +50,7 @@ static const Rule rules[] = {
 	 */
 	/* class      instance    title       tags mask     isfloating   monitor */
 	{ "Gimp",     NULL,       NULL,       0,            1,           -1 },
-	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           -1 },
+	{ WEBBROWSER, NULL,       NULL,       1 << 8,       0,           -1 },
 	{ "Plasma",   NULL,       NULL,       0             1,           -1 },
 };