diff --git a/fs/fs.c b/fs/fs.c
index 023e7ef16a..2c9f2c5ac1 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -256,7 +256,6 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 	unsigned long bytes;
 	unsigned long pos;
 	int len_read;
-	char buf[12];
 	unsigned long time;
 
 	if (argc < 2)
@@ -308,8 +307,7 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 	}
 	puts("\n");
 
-	sprintf(buf, "0x%x", len_read);
-	setenv("filesize", buf);
+	setenv_hex("filesize", len_read);
 
 	return 0;
 }
diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c
index 44be3f53e0..273c0a9638 100644
--- a/fs/ubifs/ubifs.c
+++ b/fs/ubifs/ubifs.c
@@ -687,7 +687,6 @@ int ubifs_load(char *filename, u32 addr, u32 size)
 	int i;
 	int count;
 	int last_block_size = 0;
-	char buf [10];
 
 	c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
 	/* ubifs_findfile will resolve symlinks, so we know that we get
@@ -740,8 +739,7 @@ int ubifs_load(char *filename, u32 addr, u32 size)
 	if (err)
 		printf("Error reading file '%s'\n", filename);
 	else {
-	        sprintf(buf, "%X", size);
-		setenv("filesize", buf);
+		setenv_hex("filesize", size);
 		printf("Done\n");
 	}