diff --git a/posthog/ai/langchain/callbacks.py b/posthog/ai/langchain/callbacks.py
index c244e85e..1922f787 100644
--- a/posthog/ai/langchain/callbacks.py
+++ b/posthog/ai/langchain/callbacks.py
@@ -486,6 +486,7 @@ def _capture_trace_or_span(
             "$ai_latency": run.latency,
             "$ai_span_name": run.name,
             "$ai_span_id": run_id,
+            "$ai_framework": "langchain",
         }
         if parent_run_id is not None:
             event_properties["$ai_parent_id"] = parent_run_id
@@ -556,6 +557,7 @@ def _capture_generation(
             "$ai_http_status": 200,
             "$ai_latency": run.latency,
             "$ai_base_url": run.base_url,
+            "$ai_framework": "langchain",
         }
 
         if run.tools:
diff --git a/posthog/test/ai/langchain/test_callbacks.py b/posthog/test/ai/langchain/test_callbacks.py
index ad4c049b..b6e74e6b 100644
--- a/posthog/test/ai/langchain/test_callbacks.py
+++ b/posthog/test/ai/langchain/test_callbacks.py
@@ -204,6 +204,7 @@ def test_basic_chat_chain(mock_client, stream):
     # Generation is second
     assert generation_args["event"] == "$ai_generation"
     assert "distinct_id" in generation_args
+    assert generation_props["$ai_framework"] == "langchain"
     assert "$ai_model" in generation_props
     assert "$ai_provider" in generation_props
     assert generation_props["$ai_input"] == [