diff --git a/libexec/rtld-elf/rtld_malloc.c b/libexec/rtld-elf/rtld_malloc.c
index 1246238b394..ac8af4d6b6e 100644
--- a/libexec/rtld-elf/rtld_malloc.c
+++ b/libexec/rtld-elf/rtld_malloc.c
@@ -75,8 +75,8 @@ static caddr_t		pagepool_start, pagepool_end;
 union	overhead {
 	union	overhead *ov_next;	/* when free */
 	struct {
-		u_char	ovu_magic;	/* magic number */
-		u_char	ovu_index;	/* bucket # */
+		uint16_t ovu_index;	/* bucket # */
+		uint8_t ovu_magic;	/* magic number */
 	} ovu;
 #define	ov_magic	ovu.ovu_magic
 #define	ov_index	ovu.ovu_index