diff --git a/uvicorn/protocols/http/httptools_impl.py b/uvicorn/protocols/http/httptools_impl.py
index e60277422..7be086562 100644
--- a/uvicorn/protocols/http/httptools_impl.py
+++ b/uvicorn/protocols/http/httptools_impl.py
@@ -163,9 +163,9 @@ def data_received(self, data):
 
         try:
             self.parser.feed_data(data)
-        except httptools.HttpParserError:
+        except httptools.HttpParserError as exc:
             msg = "Invalid HTTP request received."
-            self.logger.warning(msg)
+            self.logger.warning(msg, exc_info=exc)
             self.transport.close()
         except httptools.HttpParserUpgrade:
             self.handle_upgrade()