diff --git a/libarmbox/audio.cpp b/libarmbox/audio.cpp
index dc4238e..36498e4 100644
--- a/libarmbox/audio.cpp
+++ b/libarmbox/audio.cpp
@@ -49,7 +49,7 @@ void cAudio::openDevice(void)
 
 	if (fd < 0)
 	{
-		if ((fd = open(AUDIO_DEVICE, O_RDWR | O_NONBLOCK)) < 0)
+		if ((fd = open(AUDIO_DEVICE, O_RDWR)) < 0)
 			lt_info("openDevice: open failed (%m)\n");
 		fcntl(fd, F_SETFD, FD_CLOEXEC);
 		do_mute(true, false);
diff --git a/libarmbox/video.cpp b/libarmbox/video.cpp
index 0afd139..61c7f6f 100644
--- a/libarmbox/video.cpp
+++ b/libarmbox/video.cpp
@@ -178,7 +178,7 @@ void cVideo::openDevice(void)
 	if (fd != -1) /* already open */
 		return;
 retry:
-	if ((fd = open(VDEV[devnum], O_RDWR|O_CLOEXEC|O_NONBLOCK)) < 0)
+	if ((fd = open(VDEV[devnum], O_RDWR|O_CLOEXEC)) < 0)
 	{
 		if (errno == EBUSY)
 		{