diff --git a/llama_index/indices/managed/vectara/base.py b/llama_index/indices/managed/vectara/base.py
index d6fd6c5ff9db7d63279c656cbb83fe07686f51f2..d49e33f85fc4941c6e59e6e06cfebf374d0f4480 100644
--- a/llama_index/indices/managed/vectara/base.py
+++ b/llama_index/indices/managed/vectara/base.py
@@ -70,7 +70,9 @@ class VectaraIndex(BaseManagedIndex):
         super().__init__(
             show_progress=show_progress,
             index_struct=index_struct,
-            service_context=ServiceContext.from_defaults(llm=None, llm_predictor=None),
+            service_context=ServiceContext.from_defaults(
+                llm=None, llm_predictor=None, embed_model=None
+            ),
             **kwargs,
         )
         self._vectara_customer_id = vectara_customer_id or os.environ.get(