diff --git a/websocket/_app.py b/websocket/_app.py
index 14bd8a8..0b830c4 100644
--- a/websocket/_app.py
+++ b/websocket/_app.py
@@ -178,9 +178,8 @@ class WebSocketApp(object):
                         if six.PY3 and frame.opcode == ABNF.OPCODE_TEXT:
                             data = data.decode("utf-8")
                         self._callback(self.on_message, data)
-        # except Exception as e:
-        #     print(e)
-        #     self._callback(self.on_error, e)
+        except Exception as e:
+            self._callback(self.on_error, e)
         finally:
             if thread:
                 event.set()