diff --git a/TODO b/TODO
index 5886eea5..cac3a469 100644
--- a/TODO
+++ b/TODO
@@ -52,6 +52,7 @@
 	  need to be suspended
 	* allow the prefix for automatic buffers to be specified as part of the
 	  key binding to allow session buffers or similar (GitHub issue 1501)
+	* copy-pipe should be synchronous (GitHub issue 1517)
 
 - layout stuff
 	* way to tag a layout as a number/name