diff --git a/drivers/staging/mt7621-dma/mtk-hsdma.c b/drivers/staging/mt7621-dma/mtk-hsdma.c
index d67a2504adb1..4426c0e386f8 100644
--- a/drivers/staging/mt7621-dma/mtk-hsdma.c
+++ b/drivers/staging/mt7621-dma/mtk-hsdma.c
@@ -191,7 +191,7 @@ static inline u32 mtk_hsdma_read(struct mtk_hsdam_engine *hsdma, u32 reg)
 }
 
 static inline void mtk_hsdma_write(struct mtk_hsdam_engine *hsdma,
-				   unsigned reg, u32 val)
+				   unsigned int reg, u32 val)
 {
 	writel(val, hsdma->base + reg);
 }