diff --git a/src/xrt/ipc/shared/ipc_protocol.h b/src/xrt/ipc/shared/ipc_protocol.h
index fc573eb4a..e98e60fae 100644
--- a/src/xrt/ipc/shared/ipc_protocol.h
+++ b/src/xrt/ipc/shared/ipc_protocol.h
@@ -20,6 +20,7 @@
 #include "xrt/xrt_device.h"
 #include "xrt/xrt_tracking.h"
 
+#include <sys/types.h>
 
 #define IPC_MSG_SOCK_FILE "monado_comp_ipc"
 #define IPC_MAX_SWAPCHAIN_HANDLES 8