diff --git a/HamShield.h b/HamShield.h
index a277274..3bee2e8 100644
--- a/HamShield.h
+++ b/HamShield.h
@@ -242,7 +242,7 @@
 
 
 #define ROBOT8BW 2
-#define SC2-180 55
+#define SC2180 55
 #define MARTIN1 44
 
 // RTTY Frequencies