diff --git a/src/main.cpp b/src/main.cpp
index 64a6b55..e8cd585 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -32,6 +32,11 @@ HX711 lc1;
 HX711 lc2;
 HX711 lc3;
 
+void read_lc0();
+void read_lc1();
+void read_lc2();
+void read_lc3();
+
 PWMServo servo1;
 PWMServo servo2;