diff --git a/fs/exfat/utils.c b/fs/exfat/utils.c
index 0d97b65..f99dcba 100644
--- a/fs/exfat/utils.c
+++ b/fs/exfat/utils.c
@@ -134,6 +134,7 @@
 	return cpu_to_le16(hash);
 }
 
+#ifndef __UBOOT__
 void exfat_humanize_bytes(uint64_t value, struct exfat_human_bytes* hb)
 {
 	size_t i;
@@ -178,6 +179,7 @@
 	exfat_humanize_bytes(avail_space, &hb);
 	printf("Available space      %10"PRIu64" %s\n", hb.value, hb.unit);
 }
+#endif
 
 bool exfat_match_option(const char* options, const char* option_name)
 {