diff --git a/mitmproxy/addons/clientplayback.py b/mitmproxy/addons/clientplayback.py
index 27f6ae280..fc913c23e 100644
--- a/mitmproxy/addons/clientplayback.py
+++ b/mitmproxy/addons/clientplayback.py
@@ -110,7 +110,7 @@ class RequestReplayThread(basethread.BaseThread):
             f.error = flow.Error(str(e))
             self.channel.ask("error", f)
         except exceptions.Kill:
-            self.channel.tell("log", log.LogEntry("Connection killed", "info"))
+            self.channel.tell("log", log.LogEntry(flow.Error.KILLED_MESSAGE, "info"))
         except Exception as e:
             self.channel.tell("log", log.LogEntry(repr(e), "error"))
         finally:
diff --git a/mitmproxy/flow.py b/mitmproxy/flow.py
index 7044ac6c6..21ce0eac3 100644
--- a/mitmproxy/flow.py
+++ b/mitmproxy/flow.py
@@ -9,7 +9,6 @@ from mitmproxy import version
 
 
 class Error(stateobject.StateObject):
-
     """
         An Error.
 
@@ -24,6 +23,8 @@ class Error(stateobject.StateObject):
             timestamp: Seconds since the epoch
     """
 
+    KILLED_MESSAGE = "Connection killed."
+
     def __init__(self, msg: str, timestamp=None) -> None:
         """
         @type msg: str
@@ -156,7 +157,7 @@ class Flow(stateobject.StateObject):
         """
             Kill this request.
         """
-        self.error = Error("Connection killed")
+        self.error = Error(Error.KILLED_MESSAGE)
         self.intercepted = False
         self.reply.kill(force=True)
         self.live = False
diff --git a/mitmproxy/proxy/protocol/http2.py b/mitmproxy/proxy/protocol/http2.py
index 71c30b322..2f2197e1d 100644
--- a/mitmproxy/proxy/protocol/http2.py
+++ b/mitmproxy/proxy/protocol/http2.py
@@ -8,7 +8,7 @@ from h2 import connection
 from h2 import events
 import queue
 
-from mitmproxy import connections  # noqa
+from mitmproxy import connections, flow  # noqa
 from mitmproxy import exceptions
 from mitmproxy import http
 from mitmproxy.proxy.protocol import base
@@ -725,6 +725,6 @@ class Http2SingleStreamLayer(httpbase._HttpTransmissionLayer, basethread.BaseThr
         except exceptions.SetServerNotAllowedException as e:  # pragma: no cover
             self.log("Changing the Host server for HTTP/2 connections not allowed: {}".format(e), "info")
         except exceptions.Kill:  # pragma: no cover
-            self.log("Connection killed", "info")
+            self.log(flow.Error.KILLED_MESSAGE, "info")
 
         self.kill()
diff --git a/mitmproxy/proxy/server.py b/mitmproxy/proxy/server.py
index 3688b677e..2a534d470 100644
--- a/mitmproxy/proxy/server.py
+++ b/mitmproxy/proxy/server.py
@@ -1,7 +1,7 @@
 import sys
 import traceback
 
-from mitmproxy import exceptions
+from mitmproxy import exceptions, flow
 from mitmproxy import connections
 from mitmproxy import controller  # noqa
 from mitmproxy import http
@@ -120,7 +120,7 @@ class ConnectionHandler:
             root_layer = self.channel.ask("clientconnect", root_layer)
             root_layer()
         except exceptions.Kill:
-            self.log("Connection killed", "info")
+            self.log(flow.Error.KILLED_MESSAGE, "info")
         except exceptions.ProtocolException as e:
             if isinstance(e, exceptions.ClientHandshakeException):
                 self.log(
diff --git a/web/src/js/__tests__/components/FlowTable/FlowColumnsSpec.js b/web/src/js/__tests__/components/FlowTable/FlowColumnsSpec.js
index f3373c029..3622f3c1e 100644
--- a/web/src/js/__tests__/components/FlowTable/FlowColumnsSpec.js
+++ b/web/src/js/__tests__/components/FlowTable/FlowColumnsSpec.js
@@ -69,7 +69,7 @@ describe('FlowColumns Components', () => {
             tree = pathColumn.toJSON()
         expect(tree).toMatchSnapshot()
 
-        tflow.error.msg = 'Connection killed'
+        tflow.error.msg = 'Connection killed.'
         tflow.intercepted = true
         pathColumn = renderer.create(<Columns.PathColumn flow={tflow}/>)
         tree = pathColumn.toJSON()
diff --git a/web/src/js/components/FlowTable/FlowColumns.jsx b/web/src/js/components/FlowTable/FlowColumns.jsx
index 64b8ac829..7a4e112d6 100644
--- a/web/src/js/components/FlowTable/FlowColumns.jsx
+++ b/web/src/js/components/FlowTable/FlowColumns.jsx
@@ -57,7 +57,7 @@ export function PathColumn({ flow }) {
 
     let err;
     if(flow.error){
-        if (flow.error.msg === "Connection killed"){
+        if (flow.error.msg === "Connection killed."){
             err = <i className="fa fa-fw fa-times pull-right"></i>
         } else {
             err = <i className="fa fa-fw fa-exclamation pull-right"></i>