diff --git a/code/b-parasite/config/prst_config.h b/code/b-parasite/config/prst_config.h
index 6130a66..6b77478 100644
--- a/code/b-parasite/config/prst_config.h
+++ b/code/b-parasite/config/prst_config.h
@@ -35,9 +35,14 @@
 
 // PWM.
 #define PRST_PWM_PIN NRF_GPIO_PIN_MAP(0, 5)
+
+#ifdef NRF52833_XXAA
+#define PRST_FAST_DISCH_PIN NRF_GPIO_PIN_MAP(0, 25)
+#else
 #define PRST_FAST_DISCH_PIN NRF_GPIO_PIN_MAP(1, 10)
+#endif
 
 // SHT3C temp/humidity sensor.
 #define PRST_SHT3C_DEBUG 0
 
-#endif  // _PRST_CONFIG_H_
\ No newline at end of file
+#endif  // _PRST_CONFIG_H_