diff --git a/libraries/AP_Compass/AP_Compass_UAVCAN.cpp b/libraries/AP_Compass/AP_Compass_UAVCAN.cpp
index 77a2dbf2ca..79dde77a6a 100644
--- a/libraries/AP_Compass/AP_Compass_UAVCAN.cpp
+++ b/libraries/AP_Compass/AP_Compass_UAVCAN.cpp
@@ -19,10 +19,12 @@
 
 #include "AP_Compass_UAVCAN.h"
 
+#if HAL_OS_POSIX_IO
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#endif
 
 #include <AP_BoardConfig/AP_BoardConfig.h>
 #include <AP_BoardConfig/AP_BoardConfig_CAN.h>