diff --git a/main.h b/main.h
index 9c23fa00..e8feb13d 100644
--- a/main.h
+++ b/main.h
@@ -21,6 +21,7 @@
 //#include <errno.h>
 
 #define PORT 8080
+#define FREQUENCY_OFFSET 0
 
 #define A 1
 #define B 2