diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 30410eb5b982e..68923eca7d9c5 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -242,9 +242,9 @@ static bool rt5645_volatile_register(struct device *dev, unsigned int reg)
 	case RT5645_VENDOR_ID:
 	case RT5645_VENDOR_ID1:
 	case RT5645_VENDOR_ID2:
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }
 
@@ -391,9 +391,9 @@ static bool rt5645_readable_register(struct device *dev, unsigned int reg)
 	case RT5645_VENDOR_ID:
 	case RT5645_VENDOR_ID1:
 	case RT5645_VENDOR_ID2:
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }