diff --git a/vlib/v/checker/assign.v b/vlib/v/checker/assign.v
index d37f3d8852..511844ca6e 100644
--- a/vlib/v/checker/assign.v
+++ b/vlib/v/checker/assign.v
@@ -702,6 +702,9 @@ fn (mut c Checker) assign_stmt(mut node ast.AssignStmt) {
 			&& right is ast.StructInit && (right as ast.StructInit).is_anon {
 			c.error('cannot assign anonymous `struct` to a typed `struct`', right.pos())
 		}
+		if right_sym.kind == .alias && right_sym.name == 'byte' {
+			c.warn('byte is deprecated, use u8 instead', right.pos())
+		}
 	}
 	// this needs to run after the assign stmt left exprs have been run through checker
 	// so that ident.obj is set
diff --git a/vlib/v/checker/tests/struct_type_cast_err.out b/vlib/v/checker/tests/struct_type_cast_err.out
index 131b1d15eb..9f069f89f4 100644
--- a/vlib/v/checker/tests/struct_type_cast_err.out
+++ b/vlib/v/checker/tests/struct_type_cast_err.out
@@ -1,3 +1,10 @@
+vlib/v/checker/tests/struct_type_cast_err.vv:10:7: warning: byte is deprecated, use u8 instead
+    8 |     _ := u32(foo)
+    9 |     _ := rune(foo)
+   10 |     _ := byte(foo)
+      |          ~~~~~~~~~
+   11 |     _ := i8(foo)
+   12 |     _ := i64(foo)
 vlib/v/checker/tests/struct_type_cast_err.vv:5:7: error: cannot cast struct `Foo` to `string`
     3 | fn main() {
     4 |     foo := Foo{}