diff --git a/include/input.h b/include/input.h
index cd0cbee..75a8f67 100644
--- a/include/input.h
+++ b/include/input.h
@@ -153,5 +153,7 @@ void register_input_handler(void(*handler)(const char*));
 void clear_input_handler(void);
 void register_editing_handler(void(*handler)(const char*, int, int));
 void clear_editing_handler(void);
+void register_key_handler(void(*handler)(int));
+void clear_key_handler(void);
 
 #endif /* SYSTEM4_INPUT_H */
diff --git a/src/hll/InputString.c b/src/hll/InputString.c
index 4605e5c..f1839ca 100644
--- a/src/hll/InputString.c
+++ b/src/hll/InputString.c
@@ -95,10 +95,17 @@ static void handle_editing(const char *text, int start, int length)
 	has_editing_text = *text != '\0';
 }
 
+static void handle_key(int code)
+{
+	if (code == VK_BACK && !has_editing_text && result && result->size > 0)
+		string_pop_back(&result);
+}
+
 static void InputString_OpenIME(void)
 {
 	register_input_handler(handle_input);
 	register_editing_handler(handle_editing);
+	register_key_handler(handle_key);
 	has_editing_text = false;
 	SDL_StartTextInput();
 }
@@ -109,6 +116,7 @@ static void InputString_CloseIME(void)
 	has_editing_text = false;
 	clear_input_handler();
 	clear_editing_handler();
+	clear_key_handler();
 }
 
 static bool InputString_Inputs(void)
diff --git a/src/input.c b/src/input.c
index 709c748..e0a6a89 100644
--- a/src/input.c
+++ b/src/input.c
@@ -232,13 +232,20 @@ bool mouse_show_cursor(bool show)
 	return SDL_ShowCursor(show ? SDL_ENABLE : SDL_DISABLE) >= 0;
 }
 
+static void(*input_handler)(const char*);
+static void(*editing_handler)(const char*, int, int);
+static void(*key_handler)(int);
+
 static void key_event(SDL_KeyboardEvent *e, bool pressed)
 {
 	if (e->keysym.scancode >= (sizeof(sdl_keytable)/sizeof(*sdl_keytable)))
 		return;
 	enum sact_keycode code = sdl_keytable[e->keysym.scancode];
-	if (code)
+	if (code) {
 		key_state[code] = pressed;
+		if (pressed && key_handler)
+			key_handler(code);
+	}
 }
 
 static void mouse_event(SDL_MouseButtonEvent *e)
@@ -496,9 +503,6 @@ static void controller_button_event(SDL_ControllerButtonEvent *e)
 	joybutton_state[e->button] = e->state == SDL_PRESSED;
 }
 
-static void(*input_handler)(const char*);
-static void(*editing_handler)(const char*, int, int);
-
 void register_input_handler(void(*handler)(const char*))
 {
 	input_handler = handler;
@@ -519,6 +523,16 @@ void clear_editing_handler(void)
 	editing_handler = NULL;
 }
 
+void register_key_handler(void(*handler)(int))
+{
+	key_handler = handler;
+}
+
+void clear_key_handler(void)
+{
+	key_handler = NULL;
+}
+
 static void fire_deferred_events(void)
 {
 	uint32_t now = SDL_GetTicks();