diff --git a/core/src/session.rs b/core/src/session.rs
index 37a4aba0..4eecbe95 100644
--- a/core/src/session.rs
+++ b/core/src/session.rs
@@ -200,7 +200,7 @@ impl Session {
         &self.config().device_id
     }
 
-    pub fn weak(&self) -> SessionWeak {
+    fn weak(&self) -> SessionWeak {
         SessionWeak(Arc::downgrade(&self.0))
     }