diff --git a/libmproxy/dump.py b/libmproxy/dump.py
index fe81eda19..50d4dc4b2 100644
--- a/libmproxy/dump.py
+++ b/libmproxy/dump.py
@@ -31,7 +31,10 @@ def str_response(resp):
 
 
 def str_request(req):
-    return "%s %s"%(req.method, req.url())
+    r = "%s %s"%(req.method, req.url())
+    if req.stickycookie:
+        r = "[stickycookie] " + r
+    return r
 
 
 class DumpMaster(flow.FlowMaster):
diff --git a/libmproxy/flow.py b/libmproxy/flow.py
index 8e4db57d6..a82b978c1 100644
--- a/libmproxy/flow.py
+++ b/libmproxy/flow.py
@@ -126,6 +126,7 @@ class StickyCookieState:
                 ]
                 if all(match):
                     l = f.request.headers.setdefault("cookie", [])
+                    f.request.stickycookie = True
                     l.append(self.jar[i].output(header="").strip())
 
 
diff --git a/libmproxy/proxy.py b/libmproxy/proxy.py
index 286ef3fb2..2a2904e50 100644
--- a/libmproxy/proxy.py
+++ b/libmproxy/proxy.py
@@ -136,6 +136,9 @@ class Request(controller.Msg):
         self.close = False
         controller.Msg.__init__(self)
 
+        # Have this request's cookies been modified by sticky cookies?
+        self.stickycookie = False
+
     def set_replay(self):
         self.client_conn = None
 
diff --git a/test/test_dump.py b/test/test_dump.py
index 1f6b7acc9..cfa690b17 100644
--- a/test/test_dump.py
+++ b/test/test_dump.py
@@ -10,6 +10,10 @@ class uStrFuncs(libpry.AutoTree):
         t.set_replay()
         dump.str_response(t)
 
+        t = utils.treq()
+        t.stickycookie = True
+        assert "stickycookie" in dump.str_request(t)
+
 
 class uDumpMaster(libpry.AutoTree):
     def _cycle(self, m, content):