diff --git a/flask_httpauth.py b/flask_httpauth.py
index 5cfcf40..55ec468 100644
--- a/flask_httpauth.py
+++ b/flask_httpauth.py
@@ -84,7 +84,10 @@ def decorated(*args, **kwargs):
                 else:
                     password = None
                 if not self.authenticate(auth, password):
+                    # Clear TCP receive buffer of any pending data
+                    request.data
                     return self.auth_error_callback()
+
             return f(*args, **kwargs)
         return decorated