diff --git a/src/ply-utils.c b/src/ply-utils.c
index b793c614..4605114b 100644
--- a/src/ply-utils.c
+++ b/src/ply-utils.c
@@ -83,7 +83,9 @@ ply_fd_has_data (int fd)
   poll_data.revents = 0;
   result = poll (&poll_data, 1, 10);
 
-  return result == 1;
+  return result == 1 
+	  && ((poll_data.revents & POLLIN) 
+	  || (poll_data.revents & POLLPRI));
 }
 
 bool