diff --git a/changelog.d/3860.misc b/changelog.d/3860.misc
new file mode 100644
index 0000000000..364239d3e3
--- /dev/null
+++ b/changelog.d/3860.misc
@@ -0,0 +1 @@
+Fix typo in replication stream exception.
diff --git a/synapse/replication/tcp/streams.py b/synapse/replication/tcp/streams.py
index 55fe701c5c..c1e626be3f 100644
--- a/synapse/replication/tcp/streams.py
+++ b/synapse/replication/tcp/streams.py
@@ -196,7 +196,7 @@ class Stream(object):
             )
 
             if len(rows) >= MAX_EVENTS_BEHIND:
-                raise Exception("stream %s has fallen behined" % (self.NAME))
+                raise Exception("stream %s has fallen behind" % (self.NAME))
         else:
             rows = yield self.update_function(
                 from_token, current_token,