diff --git a/python/packages/azure-ai-search/agent_framework_azure_ai_search/_search_provider.py b/python/packages/azure-ai-search/agent_framework_azure_ai_search/_search_provider.py
index e11d3e8793..e3f1eca834 100644
--- a/python/packages/azure-ai-search/agent_framework_azure_ai_search/_search_provider.py
+++ b/python/packages/azure-ai-search/agent_framework_azure_ai_search/_search_provider.py
@@ -710,7 +710,7 @@ async def _semantic_search(self, query: str) -> list[str]:
                 vector_queries = [
                     VectorizableTextQuery(
                         text=query,
-                        k_nearest_neighbors=vector_k,
+                        k=vector_k,
                         fields=self.vector_field_name,
                     )
                 ]
@@ -720,7 +720,7 @@ async def _semantic_search(self, query: str) -> list[str]:
                 vector_queries = [
                     VectorizedQuery(
                         vector=query_vector,
-                        k_nearest_neighbors=vector_k,
+                        k=vector_k,
                         fields=self.vector_field_name,
                     )
                 ]