diff --git a/headers/private/kernel/debug.h b/headers/private/kernel/debug.h
index f9ea4196b8..44b07fb8c3 100644
--- a/headers/private/kernel/debug.h
+++ b/headers/private/kernel/debug.h
@@ -49,6 +49,11 @@ struct debugger_module_info {
 
 	void (*enter_debugger)(void);
 	void (*exit_debugger)(void);
+
+	// io hooks
+	int (*debugger_puts)(const char *str, int32 length);
+	int (*debugger_getchar)(void);
+	// TODO: add hooks for tunnelling gdb ?
 };
 
 extern int dbg_register_file[B_MAX_CPU_COUNT][14];
diff --git a/src/add-ons/kernel/debugger/auto_stack_trace/auto_stack_trace.cpp b/src/add-ons/kernel/debugger/auto_stack_trace/auto_stack_trace.cpp
index f26d541391..10b3530509 100644
--- a/src/add-ons/kernel/debugger/auto_stack_trace/auto_stack_trace.cpp
+++ b/src/add-ons/kernel/debugger/auto_stack_trace/auto_stack_trace.cpp
@@ -31,6 +31,8 @@ static struct debugger_module_info sModuleInfo = {
 		&std_ops
 	},
 	enter_debugger,
+	NULL,
+	NULL,
 	NULL
 };
 
diff --git a/src/add-ons/kernel/debugger/hangman/hangman.c b/src/add-ons/kernel/debugger/hangman/hangman.c
index dedb7462e0..f1218882bd 100644
--- a/src/add-ons/kernel/debugger/hangman/hangman.c
+++ b/src/add-ons/kernel/debugger/hangman/hangman.c
@@ -473,6 +473,8 @@ static struct debugger_module_info sModuleInfo = {
 		&std_ops
 	},
 	NULL,
+	NULL,
+	NULL,
 	NULL
 };
 
diff --git a/src/add-ons/kernel/debugger/invalidate_on_exit/invalidate_on_exit.cpp b/src/add-ons/kernel/debugger/invalidate_on_exit/invalidate_on_exit.cpp
index 53782af9a9..68cee2dd71 100644
--- a/src/add-ons/kernel/debugger/invalidate_on_exit/invalidate_on_exit.cpp
+++ b/src/add-ons/kernel/debugger/invalidate_on_exit/invalidate_on_exit.cpp
@@ -71,7 +71,9 @@ static struct debugger_module_info sModuleInfo = {
 	},
 
 	NULL,
-	exit_debugger
+	exit_debugger,
+	NULL,
+	NULL
 };
 
 module_info *modules[] = {