diff --git a/bbb_cape/src/cape/robot_comp.c b/bbb_cape/src/cape/robot_comp.c
index bf417e9..455a1c0 100644
--- a/bbb_cape/src/cape/robot_comp.c
+++ b/bbb_cape/src/cape/robot_comp.c
@@ -17,7 +17,8 @@
 }
 
 void robot_init(void) {
-  gpio_setup_alt(GPIOB, 11, 3);
+  // Digital input 6.
+  gpio_setup_alt(GPIOB, 9, 3);
   RCC->APB2ENR |= RCC_APB2ENR_TIM11EN;
   TIM11->CR1 = TIM_CR1_URS;
   TIM11->SMCR = 5 << 4 /* TI1 */ |