diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index aaa95523b5..6a49bf60b2 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -1414,7 +1414,9 @@ fn (g mut Gen) infix_expr(node ast.InfixExpr) {
 		g.write(',')
 		g.expr(node.right)
 		g.write(')')
-	} else if node.op in [.plus, .minus, .mul, .div] && (left_sym.name[0].is_capital() || left_sym.name.contains('.')) {
+	} else if node.op in [.plus, .minus, .mul, .div] && (left_sym.name[0].is_capital() || left_sym.name.contains('.')) &&
+		left_sym.kind != .alias {
+		// !left_sym.is_number() {
 		g.write(g.typ(node.left_type))
 		g.write('_')
 		g.write(util.replace_op(node.op.str()))