diff --git a/src/tests/add-ons/kernel/kernelland_emu/lock.cpp b/src/tests/add-ons/kernel/kernelland_emu/lock.cpp
index a01bfd38cd..dab1469ec2 100644
--- a/src/tests/add-ons/kernel/kernelland_emu/lock.cpp
+++ b/src/tests/add-ons/kernel/kernelland_emu/lock.cpp
@@ -7,7 +7,7 @@
  *		Axel Dörfler, axeld@pinc-software.de.
  */
 
-#include <lock.h>
+#include <debug.h>
 
 #if KDEBUG
 #define KDEBUG_STATIC static
@@ -21,6 +21,8 @@ static void _mutex_unlock(struct mutex* lock);
 #define mutex_lock_with_timeout	mutex_lock_with_timeout_inline
 #endif
 
+#include <lock.h>
+
 #include <stdlib.h>
 #include <string.h>