diff --git a/sml/src/sml_number.c b/sml/src/sml_number.c
index 659a40f..34455c0 100644
--- a/sml/src/sml_number.c
+++ b/sml/src/sml_number.c
@@ -74,6 +74,7 @@ void *sml_number_parse(sml_buffer *buf, unsigned char type, int max_size) {
 	if (!(sml_number_endian() == SML_BIG_ENDIAN)) {
 		sml_number_byte_swap(np, max_size);
 	}
+	sml_buf_update_bytes_read(buf, l);
 
 	return np;
 }
diff --git a/test/src/sml_number_test.c b/test/src/sml_number_test.c
index 87be968..7dcdf6a 100644
--- a/test/src/sml_number_test.c
+++ b/test/src/sml_number_test.c
@@ -56,6 +56,7 @@ TEST(sml_number, parse_unsigned8) {
 	hex2binary("6201", sml_buf_get_current_buf(buf));
 	u8 *n = sml_u8_parse(buf);
 	TEST_ASSERT_EQUAL(1, *n);
+	TEST_ASSERT_EQUAL(2, buf->cursor);
 }
 
 TEST(sml_number, parse_unsigned16) {