diff --git a/vlib/compiler/struct.v b/vlib/compiler/struct.v
index 1428efa29c..c7b4a3b5a9 100644
--- a/vlib/compiler/struct.v
+++ b/vlib/compiler/struct.v
@@ -166,7 +166,7 @@ fn (p mut Parser) struct_decl() {
 		// }
 		// Check if reserved name
 		field_name_token_idx := p.cur_tok_index()
-		field_name := if name != 'Option' { p.table.var_cgen_name(p.check_name()) } else { p.check_name() }
+		field_name := if name != 'Option' && !is_interface { p.table.var_cgen_name(p.check_name()) } else { p.check_name() }
 		/*
 		if !p.first_pass() {
 			p.fgen(strings.repeat(` `, fmt_max_len - field_name.len))
diff --git a/vlib/compiler/tests/interface_test.v b/vlib/compiler/tests/interface_test.v
index c37c325058..50af93267b 100644
--- a/vlib/compiler/tests/interface_test.v
+++ b/vlib/compiler/tests/interface_test.v
@@ -53,3 +53,23 @@ fn test_perform_speak() {
 
 }
 
+interface Register {
+	register()
+}
+
+struct RegTest {a int}
+
+fn (f RegTest) register() {
+}
+
+fn handle_reg(r Register) {
+}
+
+fn test_register() {
+	f := RegTest{}
+	f.register()
+	handle_reg(f)
+}
+
+
+