diff --git a/boot/image-fdt.c b/boot/image-fdt.c
index 73c43c30684f..cda7c3aa9e38 100644
--- a/boot/image-fdt.c
+++ b/boot/image-fdt.c
@@ -68,7 +68,7 @@ static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)
 }
 #endif

-static void boot_fdt_reserve_region(u64 addr, u64 size, enum lmb_flags flags)
+static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags)
 {
 	long ret;

@@ -100,7 +100,7 @@ void boot_fdt_add_mem_rsv_regions(void *fdt_blob)
 	int i, total, ret;
 	int nodeoffset, subnode;
 	struct fdt_resource res;
-	enum lmb_flags flags;
+	u32 flags;

 	if (fdt_check_header(fdt_blob) != 0)
 		return;
diff --git a/include/lmb.h b/include/lmb.h
index 03d5fac6aa79..7db9e0b62840 100644
--- a/include/lmb.h
+++ b/include/lmb.h
@@ -19,18 +19,15 @@
 #define LMB_ALIST_INITIAL_SIZE	4

 /**
- * enum lmb_flags - Definition of memory region attributes
- * @LMB_NONE: No special request
- * @LMB_NOMAP: Don't add to MMU configuration
- * @LMB_NOOVERWRITE: The memory region cannot be overwritten/re-reserved
- * @LMB_NONOTIFY: Do not notify other modules of changes to this memory region
- */
-enum lmb_flags {
-	LMB_NONE		= 0,
-	LMB_NOMAP		= BIT(1),
-	LMB_NOOVERWRITE		= BIT(2),
-	LMB_NONOTIFY		= BIT(3),
-};
+ * LMB_NONE: No special request
+ * LMB_NOMAP: Don't add to MMU configuration
+ * LMB_NOOVERWRITE: The memory region cannot be overwritten/re-reserved
+ * LMB_NONOTIFY: Do not notify other modules of changes to this memory region
+ */
+#define LMB_NONE 0
+#define LMB_NOMAP BIT(0)
+#define LMB_NOOVERWRITE BIT(1)
+#define LMB_NONOTIFY BIT(2)

 /**
  * struct lmb_region - Description of one region
@@ -41,7 +38,7 @@ enum lmb_flags {
 struct lmb_region {
 	phys_addr_t base;
 	phys_size_t size;
-	enum lmb_flags flags;
+	u32 flags;
 };

 /**
@@ -101,7 +98,7 @@ long lmb_reserve(phys_addr_t base, phys_size_t size);
  * * %-1	- Failure
  */
 long lmb_reserve_flags(phys_addr_t base, phys_size_t size,
-		       enum lmb_flags flags);
+		       u32 flags);

 phys_addr_t lmb_alloc(phys_size_t size, ulong align);
 phys_addr_t lmb_alloc_base(phys_size_t size, ulong align, phys_addr_t max_addr);
diff --git a/lib/lmb.c b/lib/lmb.c
index b9c26cb02e10..edecdb8e9cbf 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -188,7 +188,7 @@ static long lmb_resize_regions(struct alist *lmb_rgn_lst,
  * * %-1	- Failure
  */
 static long lmb_add_region_flags(struct alist *lmb_rgn_lst, phys_addr_t base,
-				 phys_size_t size, enum lmb_flags flags)
+				 phys_size_t size, u32 flags)
 {
 	unsigned long coalesced = 0;
 	long ret, i;
@@ -201,7 +201,7 @@ static long lmb_add_region_flags(struct alist *lmb_rgn_lst, phys_addr_t base,
 	for (i = 0; i < lmb_rgn_lst->count; i++) {
 		phys_addr_t rgnbase = rgn[i].base;
 		phys_size_t rgnsize = rgn[i].size;
-		enum lmb_flags rgnflags = rgn[i].flags;
+		u32 rgnflags = rgn[i].flags;

 		ret = lmb_addrs_adjacent(base, size, rgnbase, rgnsize);
 		if (ret > 0) {
@@ -430,14 +430,14 @@ long io_lmb_free(struct lmb *io_lmb, phys_addr_t base, phys_size_t size)

 static struct lmb lmb;

-static bool lmb_should_notify(enum lmb_flags flags)
+static bool lmb_should_notify(u32 flags)
 {
 	return !lmb.test && !(flags & LMB_NONOTIFY) &&
 		CONFIG_IS_ENABLED(EFI_LOADER);
 }

 static int lmb_map_update_notify(phys_addr_t addr, phys_size_t size, u8 op,
-				 enum lmb_flags flags)
+				 u32 flags)
 {
 	u64 efi_addr;
 	u64 pages;
@@ -470,7 +470,7 @@ static int lmb_map_update_notify(phys_addr_t addr, phys_size_t size, u8 op,
 	return 0;
 }

-static void lmb_print_region_flags(enum lmb_flags flags)
+static void lmb_print_region_flags(u32 flags)
 {
 	const char * const flag_str[] = { "none", "no-map", "no-overwrite",
 					  "no-notify" };
@@ -495,7 +495,7 @@ static void lmb_dump_region(struct alist *lmb_rgn_lst, char *name)
 {
 	struct lmb_region *rgn = lmb_rgn_lst->data;
 	unsigned long long base, size, end;
-	enum lmb_flags flags;
+	u32 flags;
 	int i;

 	printf(" %s.count = %#x\n", name, lmb_rgn_lst->count);
@@ -669,7 +669,7 @@ long lmb_free(phys_addr_t base, phys_size_t size)
 	return lmb_free_flags(base, size, LMB_NONE);
 }

-long lmb_reserve_flags(phys_addr_t base, phys_size_t size, enum lmb_flags flags)
+long lmb_reserve_flags(phys_addr_t base, phys_size_t size, u32 flags)
 {
 	long ret = 0;
 	struct alist *lmb_rgn_lst = &lmb.used_mem;
@@ -687,7 +687,7 @@ long lmb_reserve(phys_addr_t base, phys_size_t size)
 }

 static phys_addr_t _lmb_alloc_base(phys_size_t size, ulong align,
-				   phys_addr_t max_addr, enum lmb_flags flags)
+				   phys_addr_t max_addr, u32 flags)
 {
 	int ret;
 	long i, rgn;
@@ -774,7 +774,7 @@ phys_addr_t lmb_alloc_base_flags(phys_size_t size, ulong align,
 }

 static phys_addr_t _lmb_alloc_addr(phys_addr_t base, phys_size_t size,
-				   enum lmb_flags flags)
+				   u32 flags)
 {
 	long rgn;
 	struct lmb_region *lmb_memory = lmb.free_mem.data;
diff --git a/test/cmd/bdinfo.c b/test/cmd/bdinfo.c
index bb419ab2394e..014391b38ac0 100644
--- a/test/cmd/bdinfo.c
+++ b/test/cmd/bdinfo.c
@@ -104,7 +104,7 @@ static int lmb_test_dump_region(struct unit_test_state *uts,
 {
 	struct lmb_region *rgn = lmb_rgn_lst->data;
 	unsigned long long base, size, end;
-	enum lmb_flags flags;
+	u32 flags;
 	int i;

 	ut_assert_nextline(" %s.count = %#x", name, lmb_rgn_lst->count);
