diff --git a/vlib/v/gen/c/fn.v b/vlib/v/gen/c/fn.v
index d29b51f1d3ef1b..7aee2789982f2e 100644
--- a/vlib/v/gen/c/fn.v
+++ b/vlib/v/gen/c/fn.v
@@ -2256,6 +2256,9 @@ fn (mut g Gen) ref_or_deref_arg(arg ast.CallArg, expected_type ast.Type, lang as
 						g.write('(voidptr)&/*qq*/')
 					} else {
 						needs_closing = true
+						if arg_typ_sym.kind in [.sum_type, .interface_] {
+							atype = arg_typ
+						}
 						g.write('ADDR(${g.typ(atype)}/*qq*/, ')
 					}
 				}
diff --git a/vlib/v/tests/chan_interface_test.v b/vlib/v/tests/chan_interface_test.v
new file mode 100644
index 00000000000000..eb7a2f3926efc1
--- /dev/null
+++ b/vlib/v/tests/chan_interface_test.v
@@ -0,0 +1,17 @@
+interface TestInterface {
+	a int
+}
+
+struct TestStruct {
+	a int
+}
+
+fn test_chan_interface() {
+	c := chan TestInterface{cap: 1}
+
+	c.try_push(TestInterface(TestStruct{ a: 1 }))
+
+	m := <-c
+	println(m)
+	assert m.a == 1
+}