diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 7a368059cd7d..2be11a11bb8b 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -637,7 +637,7 @@ struct arm_smmu_master {
 	struct list_head		domain_head;
 	u32				*sids;
 	unsigned int			num_sids;
-	bool				ats_enabled		:1;
+	bool				ats_enabled;
 };
 
 /* SMMU private data for an IOMMU domain */