diff --git a/build/systemMenu_tools/SystemUpdater/ARM9.TWL/src/main.c b/build/systemMenu_tools/SystemUpdater/ARM9.TWL/src/main.c
index f898500a..de92bfc2 100644
--- a/build/systemMenu_tools/SystemUpdater/ARM9.TWL/src/main.c
+++ b/build/systemMenu_tools/SystemUpdater/ARM9.TWL/src/main.c
@@ -196,6 +196,10 @@ TwlMain()
 				{
 					running = IS_TWL_DEBUGGER;
 				}
+				else if (type == IS_TOOL_TYPE_ERROR) // TSボードプラス + 旧仕様デバッガ
+				{
+					running = IS_TWL_DEBUGGER;
+				}
 				else if (type == IS_TOOL_TYPE_CAPTURE)
 				{
 					running = IS_TWL_CAPTURE;