diff --git a/litellm/litellm_core_utils/realtime_streaming.py b/litellm/litellm_core_utils/realtime_streaming.py
index 8df41aea4a3..760efa71ab7 100644
--- a/litellm/litellm_core_utils/realtime_streaming.py
+++ b/litellm/litellm_core_utils/realtime_streaming.py
@@ -230,9 +230,9 @@ class RealTimeStreaming:
                 message, self.model, self.session_configuration_request
             )
             for msg in transformed:
-                await self.backend_ws.send(msg)
+                await self.backend_ws.send(msg)  # type: ignore[union-attr]
         else:
-            await self.backend_ws.send(message)
+            await self.backend_ws.send(message)  # type: ignore[union-attr]
 
     def _has_realtime_guardrails(self) -> bool:
         """Return True if any callback is registered for realtime guardrail event types."""
@@ -362,7 +362,7 @@ class RealTimeStreaming:
                         "[realtime guardrail] ending session after violation %d",
                         self._violation_count,
                     )
-                    await self.backend_ws.close()
+                    await self.backend_ws.close()  # type: ignore[union-attr]
 
                 verbose_logger.warning(
                     "[realtime guardrail] BLOCKED transcript (violation %d): %r",