diff --git a/libs/main/core/piwaitevent_p.cpp b/libs/main/core/piwaitevent_p.cpp
index dfb2b23c..47983a5d 100644
--- a/libs/main/core/piwaitevent_p.cpp
+++ b/libs/main/core/piwaitevent_p.cpp
@@ -89,11 +89,11 @@ bool PIWaitEvent::wait(int fd, CheckRole role) {
 	FD_SET(pipe_fd[ReadEnd], &(fds[CheckRead]));
 	FD_SET(fd, &(fds[CheckExeption]));
 	if (fd_index != CheckExeption) FD_SET(fd, &(fds[fd_index]));
-	int sr  = ::select(nfds, &(fds[CheckRead]), &(fds[CheckWrite]), &(fds[CheckExeption]), nullptr);
+	int sr = ::select(nfds, &(fds[CheckRead]), &(fds[CheckWrite]), &(fds[CheckExeption]), nullptr);
 	if (sr < 0) return false;
+	errorClear();
 	int buf = 0;
-	while (::read(pipe_fd[ReadEnd], &buf, sizeof(buf)) > 0)
-		;
+	while (::read(pipe_fd[ReadEnd], &buf, sizeof(buf)) > 0) {}
 	// piCout << "wait result" << sr << FD_ISSET(fd, &(fds[CheckExeption])) << FD_ISSET(fd, &(fds[fd_index]));
 	if (errno == EBADF || errno == EINTR) return false;
 	if (FD_ISSET(fd, &(fds[CheckExeption]))) return true;