diff --git a/PID_v1.h b/PID_v1.h
index 9cba046..42851e4 100644
--- a/PID_v1.h
+++ b/PID_v1.h
@@ -2,7 +2,7 @@
 #define PID_v1_h
 #define LIBRARY_VERSION	1.2.1
 
-class PID
+class PID2
 {