diff --git a/headers/os/kernel/OS.h b/headers/os/kernel/OS.h
index e5accd98a4..1ca2c335ea 100644
--- a/headers/os/kernel/OS.h
+++ b/headers/os/kernel/OS.h
@@ -371,6 +371,11 @@ extern void debug_vprintf(const char *format, va_list args);
 #	define B_MAX_CPU_COUNT	8
 #elif __POWERPC__
 #	define B_MAX_CPU_COUNT	8
+#elif __M68K__
+#	define B_MAX_CPU_COUNT	1
+#else
+#	warning Unknown cpu
+#	define B_MAX_CPU_COUNT	1
 #endif
 
 #define OBOS_CPU_TYPES
diff --git a/headers/os/kernel/debugger.h b/headers/os/kernel/debugger.h
index 5084f5a1c2..85aa1c3a96 100644
--- a/headers/os/kernel/debugger.h
+++ b/headers/os/kernel/debugger.h
@@ -15,6 +15,10 @@
 	#include <arch/x86/arch_debugger.h>
 #elif __POWERPC__
 	#include <arch/ppc/arch_debugger.h>
+#elif __M68K__
+	#include <arch/m68k/arch_debugger.h>
+#else
+	#error you need to write a <arch/<cpu>/arch_debugger.h>
 #endif
 
 typedef struct debug_cpu_state debug_cpu_state;