src/cmd/gc/typecheck.c | 1 +

diff --git a/src/cmd/gc/typecheck.c b/src/cmd/gc/typecheck.c
index 919d99ecf77edf413ee44b15f9abe6799d180e00..70464a4b7670e6eefcb60b1a8294429a451ac0cd 100644
--- a/src/cmd/gc/typecheck.c
+++ b/src/cmd/gc/typecheck.c
@@ -656,6 +656,7 @@ 		defaultlit(&n->right, t->type);
 		r = n->right;
 		if((t = r->type) == T)
 			goto error;
+		r = assignconv(r, l->type->type, "send");
 		// TODO: more aggressive
 		n->etype = 0;
 		n->type = T;