diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 0359046699..f3435a9825 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -2314,11 +2314,12 @@ fn (mut g Gen) return_statement(node ast.Return) {
 			g.writeln(' }, sizeof($styp));')
 			return
 		}
-		if sym.kind == .interface_ {
+		cast_interface := sym.kind == .interface_ && node.types[0] != g.fn_decl.return_type
+		if cast_interface {
 			g.interface_call(node.types[0], g.fn_decl.return_type)
 		}
 		g.expr_with_cast(node.exprs[0], node.types[0], g.fn_decl.return_type)
-		if sym.kind == .interface_ {
+		if cast_interface {
 			g.write(')')
 		}
 	}
diff --git a/vlib/v/tests/interface_test.v b/vlib/v/tests/interface_test.v
index f6da952007..0d6a1915d2 100644
--- a/vlib/v/tests/interface_test.v
+++ b/vlib/v/tests/interface_test.v
@@ -243,3 +243,7 @@ fn new_animal() Animal {
 	dog := Dog{}
 	return dog
 }
+
+fn new_animal2() Animal {
+	return new_animal()
+}