diff --git a/CHANGES.md b/CHANGES.md
index 9c481ff..8fba0b1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,7 +8,7 @@ Known issues:
 
 ## bunyan 1.3.4 (not yet released)
 
-(nothing yet)
+- [issue #218] Reset `haveNonRawStreams` on `<logger>.addStream`.
 
 
 ## bunyan 1.3.3
diff --git a/lib/bunyan.js b/lib/bunyan.js
index 336d60e..f7b4d9e 100644
--- a/lib/bunyan.js
+++ b/lib/bunyan.js
@@ -550,6 +550,7 @@ Logger.prototype.addStream = function addStream(s, defaultLevel) {
     }
 
     self.streams.push(s);
+    delete self.haveNonRawStreams;  // reset
 }