diff --git a/drivers/of/base.c b/drivers/of/base.c
index d4bea3c797d6..84cf2f3f396c 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2112,7 +2112,7 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
 			continue;
 
 		/* Allocate an alias_prop with enough space for the stem */
-		ap = dt_alloc(sizeof(*ap) + len + 1, 4);
+		ap = dt_alloc(sizeof(*ap) + len + 1, __alignof__(*ap));
 		if (!ap)
 			continue;
 		memset(ap, 0, sizeof(*ap) + len + 1);