diff --git a/src/runtime2/inbox2.rs b/src/runtime2/inbox2.rs
index 9a8754e20b72a68b488bf80f25adf85c699ad4c8..a38bdd08b1ace47a29d4c6fcd2cddfa67261444c 100644
--- a/src/runtime2/inbox2.rs
+++ b/src/runtime2/inbox2.rs
@@ -98,12 +98,12 @@ impl PublicInbox {
         }
     }
 
-    pub fn insert_message(&self, message: MessageFancy) {
+    pub(crate) fn insert_message(&self, message: MessageFancy) {
         let mut lock = self.messages.lock().unwrap();
         lock.push_back(message);
     }
 
-    pub fn take_message(&self) -> Option<MessageFancy> {
+    pub(crate) fn take_message(&self) -> Option<MessageFancy> {
         let mut lock = self.messages.lock().unwrap();
         return lock.pop_front();
     }