diff --git a/drivers/mux/core.c b/drivers/mux/core.c
index 78c0022697ec..02be4ba37257 100644
--- a/drivers/mux/core.c
+++ b/drivers/mux/core.c
@@ -42,7 +42,7 @@ struct mux_state {
 	unsigned int state;
 };
 
-static struct class mux_class = {
+static const struct class mux_class = {
 	.name = "mux",
 };