diff --git a/src/tests/add-ons/kernel/kernelland_emu/debug.cpp b/src/tests/add-ons/kernel/kernelland_emu/debug.cpp
index 9f20c658c0..cc0fd0596e 100644
--- a/src/tests/add-ons/kernel/kernelland_emu/debug.cpp
+++ b/src/tests/add-ons/kernel/kernelland_emu/debug.cpp
@@ -8,6 +8,7 @@
  */
 
 #include <signal.h>
+#define _KERNEL_MODE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>