diff --git a/vlib/crypto/rc4/rc4.v b/vlib/crypto/rc4/rc4.v
index f05aac8964..74f949970a 100644
--- a/vlib/crypto/rc4/rc4.v
+++ b/vlib/crypto/rc4/rc4.v
@@ -16,8 +16,8 @@ import crypto.internal.subtle
 struct Cipher {
 mut:
 	s []u32
-	i byte
-	j byte
+	i u8
+	j u8
 }
 
 // new_cipher creates and returns a new Cipher. The key argument should be the
diff --git a/vlib/mysql/stmt.c.v b/vlib/mysql/stmt.c.v
index cef2ec1517..97ea72674f 100644
--- a/vlib/mysql/stmt.c.v
+++ b/vlib/mysql/stmt.c.v
@@ -153,6 +153,10 @@ pub fn (mut stmt Stmt) bind_bool(b &bool) {
 	stmt.bind(mysql.mysql_type_tiny, b, 0)
 }
 
+pub fn (mut stmt Stmt) bind_byte(b &byte) {
+	stmt.bind(mysql.mysql_type_tiny, b, 0)
+}
+
 pub fn (mut stmt Stmt) bind_u8(b &u8) {
 	stmt.bind(mysql.mysql_type_tiny, b, 0)
 }
diff --git a/vlib/strings/builder.c.v b/vlib/strings/builder.c.v
index 29a0609d6e..35f35b5124 100644
--- a/vlib/strings/builder.c.v
+++ b/vlib/strings/builder.c.v
@@ -60,6 +60,11 @@ pub fn (mut b Builder) write_u8(data u8) {
 	b << data
 }
 
+// write_byte appends a single `data` byte to the accumulated buffer
+pub fn (mut b Builder) write_byte(data byte) {
+	b << data
+}
+
 // write implements the Writer interface
 pub fn (mut b Builder) write(data []u8) ?int {
 	if data.len == 0 {
diff --git a/vlib/strings/builder.js.v b/vlib/strings/builder.js.v
index bea3db6890..3340582589 100644
--- a/vlib/strings/builder.js.v
+++ b/vlib/strings/builder.js.v
@@ -23,6 +23,10 @@ pub fn (mut b Builder) write_b(data u8) {
 	b << data
 }
 
+pub fn (mut b Builder) write_byte(data byte) {
+	b << data
+}
+
 pub fn (mut b Builder) write_u8(data u8) {
 	b << data
 }