diff --git a/code/b-parasite/config/prst_config.h b/code/b-parasite/config/prst_config.h
index 8aef6d3..a87bce9 100644
--- a/code/b-parasite/config/prst_config.h
+++ b/code/b-parasite/config/prst_config.h
@@ -7,7 +7,7 @@
 #define PRST_LED_PIN NRF_GPIO_PIN_MAP(0, 28)
 
 // Photo Sensor
-#define PRST_PHOTO_V NRF_GPIO_PIN_MAP(1, 11)
+#define PRST_PHOTO_V NRF_GPIO_PIN_MAP(0, 29)
 #define PRST_PHOTO_OUT NRF_GPIO_PIN_MAP(0, 2)
 
 // Deep sleep.