diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 53650beea38..36912ae428d 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -518,11 +518,6 @@ void drop_port(rust_port *port) {
     port->ref_count--;
 }
 
-extern "C" CDECL
-void chan_send(rust_chan *chan, void *sptr) {
-    chan->send(sptr);
-}
-
 extern "C" CDECL void
 chan_id_send(type_desc *t, rust_task_id target_task_id,
              rust_port_id target_port_id, void *sptr) {
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index 3063d57f801..f74947be0b6 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -10,7 +10,6 @@ aio_stop
 aio_writedata
 align_of
 chan_id_send
-chan_send
 check_claims
 debug_box
 debug_fn