diff --git a/src/gps/NMEAWPL.h b/src/gps/NMEAWPL.h
index 1c0ef5de3..853c850eb 100644
--- a/src/gps/NMEAWPL.h
+++ b/src/gps/NMEAWPL.h
@@ -3,5 +3,5 @@
 #include <Arduino.h>
 #include "main.h"
 
-uint printWPL(char *buf, Position &pos, const char *name);
-uint printGGA(char *buf, Position &pos);
+uint printWPL(char *buf, const Position &pos, const char *name);
+uint printGGA(char *buf, const Position &pos);