diff --git a/radio/src/pulses/pxx2.h b/radio/src/pulses/pxx2.h
index 3e0852167..5893ef975 100644
--- a/radio/src/pulses/pxx2.h
+++ b/radio/src/pulses/pxx2.h
@@ -23,6 +23,7 @@
 
 #include "./pxx.h"
 
+// should not be used anymore
 class SportCrcMixin {
   protected:
     void initCrc()
@@ -59,10 +60,6 @@ class Pxx2Pulses: public PxxPulses<Pxx2Transport> {
   public:
     void setupFrame(uint8_t port);
 
-  protected:
-    uint8_t data[64];
-    uint8_t * ptr;
-
     void addHead()
     {
       // send 7E, do not CRC