diff --git a/src/kits/storage/LibBeAdapter.cpp b/src/kits/storage/LibBeAdapter.cpp
index d3936d547f..cd49e607c5 100644
--- a/src/kits/storage/LibBeAdapter.cpp
+++ b/src/kits/storage/LibBeAdapter.cpp
@@ -735,11 +735,3 @@ _kern_get_safemode_option(const char *parameter, char *buffer, size_t *_bufferSi
 	return _kget_safemode_option_(parameter, buffer, _bufferSize);
 }
 
-
-extern "C" status_t
-_kern_shutdown(bool reboot)
-{
-	puts(reboot ? "reboot" : "shutdown");
-	return B_ERROR;
-}
-
diff --git a/src/servers/registrar/R5Compatibility.cpp b/src/servers/registrar/R5Compatibility.cpp
index b80cc39e2e..e86d51c602 100644
--- a/src/servers/registrar/R5Compatibility.cpp
+++ b/src/servers/registrar/R5Compatibility.cpp
@@ -3,21 +3,30 @@
  * Distributed under the terms of the MIT License.
  */
 
-// Syscalls not existing under R5
+//! Syscalls not existing under R5
 
 #include <syscalls.h>
+#include <stdio.h>
+
 
 // _kern_register_messaging_service
-area_id
+extern "C" area_id
 _kern_register_messaging_service(sem_id lockSem, sem_id counterSem)
 {
 	return B_ERROR;
 }
 
 // _kern_unregister_messaging_service
-status_t
+extern "C" status_t
 _kern_unregister_messaging_service()
 {
 	return B_ERROR;
 }
 
+extern "C" status_t
+_kern_shutdown(bool reboot)
+{
+	puts(reboot ? "reboot" : "shutdown");
+	return B_ERROR;
+}
+