diff --git a/degesch.c b/degesch.c
index 790ee7b..e01da85 100644
--- a/degesch.c
+++ b/degesch.c
@@ -4000,6 +4000,12 @@ mode_processor_run (struct mode_processor *self,
 	}
 }
 
+static int
+mode_char_cmp (const void *a, const void *b)
+{
+	return *(const char *) a - *(const char *) b;
+}
+
 static void
 mode_processor_toggle (struct mode_processor *self, struct str *modes)
 {
@@ -4010,7 +4016,7 @@ mode_processor_toggle (struct mode_processor *self, struct str *modes)
 	if (self->adding)
 	{
 		str_append_c (modes, self->mode_char);
-		// TODO: sort the modes
+		qsort (modes->str, modes->len, 1, mode_char_cmp);
 	}
 	else
 		str_remove_slice (modes, pos - modes->str, 1);