diff --git a/dist/idac/segatools.ini b/dist/idac/segatools.ini
index 2da93ef..a99f2f8 100644
--- a/dist/idac/segatools.ini
+++ b/dist/idac/segatools.ini
@@ -89,6 +89,8 @@ coin=0x33
 mode=xinput
 
 [xinput]
+; Left and right thumbsticks are mapped to left and right dpad buttons.
+; Press both thumbsticks to trigger "Time Up" and exit the course.
 ; Automatically reset the simulated shifter to Neutral when XInput Start is
 ; pressed (e.g. when navigating menus between races).
 autoNeutral=1
diff --git a/idacio/xi.c b/idacio/xi.c
index 918acad..b83aa9d 100644
--- a/idacio/xi.c
+++ b/idacio/xi.c
@@ -99,11 +99,11 @@ static void idac_xi_get_gamebtns(uint8_t *gamebtn_out) {
         gamebtn |= IDAC_IO_GAMEBTN_DOWN;
     }
 
-    if (xb & XINPUT_GAMEPAD_DPAD_LEFT) {
+    if (xb & (XINPUT_GAMEPAD_DPAD_LEFT | XINPUT_GAMEPAD_LEFT_THUMB)) {
         gamebtn |= IDAC_IO_GAMEBTN_LEFT;
     }
 
-    if (xb & XINPUT_GAMEPAD_DPAD_RIGHT) {
+    if (xb & (XINPUT_GAMEPAD_DPAD_RIGHT | XINPUT_GAMEPAD_RIGHT_THUMB)) {
         gamebtn |= IDAC_IO_GAMEBTN_RIGHT;
     }