diff --git a/winsup/cygwin/include/cygwin/signal.h b/winsup/cygwin/include/cygwin/signal.h
index af0833688..a8c852ddb 100644
--- a/winsup/cygwin/include/cygwin/signal.h
+++ b/winsup/cygwin/include/cygwin/signal.h
@@ -265,8 +265,7 @@ enum
   SI_MESGQ,				/* sent by real time mesq state change
 					   (currently unimplemented) */
   SI_TIMER,				/* sent by timer expiration */
-  SI_QUEUE,				/* sent by sigqueue (currently
-					   unimplemented) */
+  SI_QUEUE,				/* sent by sigqueue */
   SI_KERNEL,				/* sent by system */
 
   ILL_ILLOPC,				/* illegal opcode */