diff --git a/ports/src/noux/main.cc b/ports/src/noux/main.cc
index 3d62fe5fc4..d82465b1c9 100644
--- a/ports/src/noux/main.cc
+++ b/ports/src/noux/main.cc
@@ -163,6 +163,9 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
 						_block_for_io_channel(io);
 
 				io->read(_sysio);
+				if (_sysio->read_out.count == -1)
+					return false;
+
 				return true;
 			}