diff --git a/src/zero_cross_detection/zero_cross_detection.c b/src/zero_cross_detection/zero_cross_detection.c
index 6099609..a65bb2e 100644
--- a/src/zero_cross_detection/zero_cross_detection.c
+++ b/src/zero_cross_detection/zero_cross_detection.c
@@ -19,8 +19,8 @@
 
 void ZCD_Setup(void)
 {
-    ADC_Init(7);
-    ADC_Enable(7);
+    ADC_Init(ZCD_PIN);
+    ADC_Enable(ZCD_PIN);
 }
 
 bool ZCD_IsTriggered()