diff --git a/backends/platform/null/null.cpp b/backends/platform/null/null.cpp
index a5eea06f7ac0..be50fde27ce5 100644
--- a/backends/platform/null/null.cpp
+++ b/backends/platform/null/null.cpp
@@ -47,6 +47,8 @@
 	#include "backends/fs/amigaos4/amigaos4-fs-factory.h"
 #elif defined(POSIX)
 	#include "backends/fs/posix/posix-fs-factory.h"
+#elif defined(RISCOS)
+	#include "backends/fs/riscos/riscos-fs-factory.h"
 #elif defined(WIN32)
 	#include "backends/fs/windows/windows-fs-factory.h"
 #endif
@@ -73,6 +75,8 @@ OSystem_NULL::OSystem_NULL() {
 		_fsFactory = new AmigaOSFilesystemFactory();
 	#elif defined(POSIX)
 		_fsFactory = new POSIXFilesystemFactory();
+	#elif defined(RISCOS)
+		_fsFactory = new RISCOSFilesystemFactory();
 	#elif defined(WIN32)
 		_fsFactory = new WindowsFilesystemFactory();
 	#else