diff --git a/codex-rs/protocol/src/session_id.rs b/codex-rs/protocol/src/session_id.rs
index 5af262677d..e9c3f0412a 100644
--- a/codex-rs/protocol/src/session_id.rs
+++ b/codex-rs/protocol/src/session_id.rs
@@ -64,18 +64,6 @@ impl From<SessionId> for ThreadId {
     }
 }
 
-impl PartialEq<ThreadId> for SessionId {
-    fn eq(&self, other: &ThreadId) -> bool {
-        self.to_string() == other.to_string()
-    }
-}
-
-impl PartialEq<SessionId> for ThreadId {
-    fn eq(&self, other: &SessionId) -> bool {
-        self.to_string() == other.to_string()
-    }
-}
-
 impl Default for SessionId {
     fn default() -> Self {
         Self::new()