diff --git a/src/drivers/device/vdev_posix.cpp b/src/drivers/device/vdev_posix.cpp
index df2d55c8b3..b6954cd9da 100644
--- a/src/drivers/device/vdev_posix.cpp
+++ b/src/drivers/device/vdev_posix.cpp
@@ -59,7 +59,7 @@ volatile bool sim_delay = false;
 
 extern "C" {
 
-#define PX4_MAX_FD 300
+#define PX4_MAX_FD 350
 	static device::file_t *filemap[PX4_MAX_FD] = {};
 
 	int px4_errno;