diff --git a/include/mux.h b/include/mux.h
index 9f80991..c92d887 100644
--- a/include/mux.h
+++ b/include/mux.h
@@ -23,7 +23,7 @@
 struct udevice;
 struct mux_control;
 
-#if CONFIG_IS_ENABLED(MULTIPLEXER)
+#if IS_ENABLED(CONFIG_MULTIPLEXER)
 /**
  * mux_control_states() - Query the number of multiplexer states.
  * @mux: The mux-control to query.