diff --git a/boot/image-fdt.c b/boot/image-fdt.c
index 3f0ac54f76f..a3a4fb8b558 100644
--- a/boot/image-fdt.c
+++ b/boot/image-fdt.c
@@ -189,6 +189,12 @@ int boot_relocate_fdt(char **of_flat_tree, ulong *of_size)
 			/* All ones means use fdt in place */
 			of_start = fdt_blob;
 			addr = map_to_sysmem(fdt_blob);
+			printf("WARNING:\n"
+			       "The 'fdt_high' environment variable is set to ~0. This is known to cause\n"
+			       "boot failures due to placement of DT at non-8-byte-aligned addresses.\n"
+			       "This system will likely fail to boot. Unset the 'fdt_high' environment\n"
+			       "variable and submit a fix upstream.\n");
+
 			err = lmb_alloc_mem(LMB_MEM_ALLOC_ADDR, 0, &addr,
 					    of_len, LMB_NONE);
 			if (err) {