diff --git a/vlib/compiler/gen_c.v b/vlib/compiler/gen_c.v
index bb2b83b7c1..40496c61f2 100644
--- a/vlib/compiler/gen_c.v
+++ b/vlib/compiler/gen_c.v
@@ -628,15 +628,15 @@ fn (p mut Parser) cast(typ string) {
 			p.error('cannot cast `bool` to `$typ`')
 		}
 		if typ != expr_typ && typ in p.table.sum_types {
-			T := p.table.find_type(typ)
-			if expr_typ in T.ctype_names {
+			tt := p.table.find_type(typ)
+			if expr_typ in tt.ctype_names {
 				// There is no need for a cast here, since it was already done
 				// in p.bool_expression, SUM TYPE CAST2 . Besides, doubling the
 				// cast here causes MSVC to complain with:
 				// error C2440: 'type cast': cannot convert from 'ExprType' to 'ExprType'
 				p.cgen.set_placeholder(pos, '(')
 			}else{
-				p.warn('only $T.ctype_names can be casted to `$typ`')
+				p.warn('only $tt.ctype_names can be casted to `$typ`')
 				p.error('cannot cast `$expr_typ` to `$typ`')
 			}
 		}else{
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 608c0ed414..d53debf25a 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -206,6 +206,7 @@ pub fn (c mut Checker) call_expr(call_expr ast.CallExpr) table.Type {
 	}
 	for i, arg_expr in call_expr.args {
 		arg := if f.is_variadic && i >= f.args.len - 1 { f.args[f.args.len - 1] } else { f.args[i] }
+		c.expected_type = arg.typ
 		typ := c.expr(arg_expr)
 		typ_sym := c.table.get_type_symbol(typ)
 		arg_typ_sym := c.table.get_type_symbol(arg.typ)