diff --git a/src/servers/registrar/R5Compatibility.cpp b/src/servers/registrar/R5Compatibility.cpp
new file mode 100644
index 0000000000..b80cc39e2e
--- /dev/null
+++ b/src/servers/registrar/R5Compatibility.cpp
@@ -0,0 +1,23 @@
+/* 
+ * Copyright 2005, Ingo Weinhold, bonefish@users.sf.net. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+// Syscalls not existing under R5
+
+#include <syscalls.h>
+
+// _kern_register_messaging_service
+area_id
+_kern_register_messaging_service(sem_id lockSem, sem_id counterSem)
+{
+	return B_ERROR;
+}
+
+// _kern_unregister_messaging_service
+status_t
+_kern_unregister_messaging_service()
+{
+	return B_ERROR;
+}
+