diff --git a/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/llama_index/vector_stores/opensearch/base.py b/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/llama_index/vector_stores/opensearch/base.py
index 3acb9291c2aab..8fdd0f5c3a808 100644
--- a/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/llama_index/vector_stores/opensearch/base.py
+++ b/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/llama_index/vector_stores/opensearch/base.py
@@ -634,7 +634,7 @@ def _is_efficient_filtering_enabled(self) -> bool:
             ef_enabled = False
         else:
             self._os_version = self._get_opensearch_version()
-            major, minor, patch = self.os_version.split(".")
+            major, minor, patch = self._os_version.split(".")
             ef_enabled = int(major) >= 2 and int(minor) >= 9
         return ef_enabled
 
diff --git a/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/pyproject.toml b/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/pyproject.toml
index db6d509ebb7b7..6231794f8b1f8 100644
--- a/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/pyproject.toml
+++ b/llama-index-integrations/vector_stores/llama-index-vector-stores-opensearch/pyproject.toml
@@ -27,7 +27,7 @@ exclude = ["**/BUILD"]
 license = "MIT"
 name = "llama-index-vector-stores-opensearch"
 readme = "README.md"
-version = "0.5.1"
+version = "0.5.2"
 
 [tool.poetry.dependencies]
 python = ">=3.9,<4.0"