diff --git a/drivers/clk/mediatek/clk-cpumux.c b/drivers/clk/mediatek/clk-cpumux.c
index 344c6399b22f..658aee789f44 100644
--- a/drivers/clk/mediatek/clk-cpumux.c
+++ b/drivers/clk/mediatek/clk-cpumux.c
@@ -5,8 +5,11 @@
  */
 
 #include <linux/clk-provider.h>
+#include <linux/container_of.h>
+#include <linux/err.h>
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
 
 #include "clk-mtk.h"
diff --git a/drivers/clk/mediatek/clk-cpumux.h b/drivers/clk/mediatek/clk-cpumux.h
index a538f2bbef0d..b07e89f7c283 100644
--- a/drivers/clk/mediatek/clk-cpumux.h
+++ b/drivers/clk/mediatek/clk-cpumux.h
@@ -7,6 +7,10 @@
 #ifndef __DRV_CLK_CPUMUX_H
 #define __DRV_CLK_CPUMUX_H
 
+struct clk_onecell_data;
+struct device_node;
+struct mtk_composite;
+
 int mtk_clk_register_cpumuxes(struct device_node *node,
 			      const struct mtk_composite *clks, int num,
 			      struct clk_onecell_data *clk_data);