diff --git a/config.h b/config.h
index 1b4811f..a92f28e 100644
--- a/config.h
+++ b/config.h
@@ -29,12 +29,13 @@ static const Rule rules[] = {
 	 *	WM_CLASS(STRING) = instance, class
 	 *	WM_NAME(STRING) = title
 	 */
-	/* class      instance    title       tags mask     isfloating   monitor */
-	{ "Gimp",     NULL,       NULL,       1 << 5,       0,           -1 },
-	{ "Steam",    NULL,       NULL,       1 << 1,       0,           -1 },
-	{ "Firefox",  NULL,       NULL,       1 << 2,       0,           -1 },
-	{ "float",    NULL,       NULL,       ~0,           1,           -1 },
-	{ "mpv",      NULL,       NULL,       0,            1,           -1 },
+	/* class              instance    title       tags mask     isfloating   monitor */
+	{ "telegram-desktop", NULL,       NULL,       1 << 4,       0,           -1 },
+	{ "Gimp",             NULL,       NULL,       1 << 5,       0,           -1 },
+	{ "Steam",            NULL,       NULL,       1 << 1,       0,           -1 },
+	{ "Firefox",          NULL,       NULL,       1 << 2,       0,           -1 },
+	{ "float",            NULL,       NULL,       ~0,           1,           -1 },
+	{ "mpv",              NULL,       NULL,       0,            1,           -1 },
 };
 
 /* layout(s) */