diff --git a/src/hpack-enc.c b/src/hpack-enc.c
index 70d2b12f6..2bb005071 100644
--- a/src/hpack-enc.c
+++ b/src/hpack-enc.c
@@ -102,7 +102,7 @@ int hpack_encode_header(struct buffer *out, const struct ist n,
 	else if (isteq(n, ist("last-modified")))
 		out->area[len++] = 0x6c; // literal with indexing -- name="last-modified" (idx 44)
 	else if (isteq(n, ist("accept-ranges")))
-		out->area[len++] = 0x51; // literal with indexing -- name="accept-ranges" (idx 17)
+		out->area[len++] = 0x52; // literal with indexing -- name="accept-ranges" (idx 18)
 	else if (isteq(n, ist("cache-control")))
 		out->area[len++] = 0x58; // literal with indexing -- name="cache-control" (idx 24)
 	else if (isteq(n, ist("content-length")))