diff --git a/src/add-ons/kernel/bus_managers/usb/PhysicalMemoryAllocator.cpp b/src/add-ons/kernel/bus_managers/usb/PhysicalMemoryAllocator.cpp
index 8897dc4e98..adf5117268 100644
--- a/src/add-ons/kernel/bus_managers/usb/PhysicalMemoryAllocator.cpp
+++ b/src/add-ons/kernel/bus_managers/usb/PhysicalMemoryAllocator.cpp
@@ -9,6 +9,8 @@
 #include <malloc.h>
 #include <string.h>
 #include <KernelExport.h>
+#include <util/kernel_cpp.h>
+#include "BeOSCompatibility.h"
 #include "PhysicalMemoryAllocator.h"