diff --git a/radio/src/io/frsky_pxx2.h b/radio/src/io/frsky_pxx2.h
index 1ee9be85b..eab3c3850 100644
--- a/radio/src/io/frsky_pxx2.h
+++ b/radio/src/io/frsky_pxx2.h
@@ -25,7 +25,7 @@
 #include "../fifo.h"
 #include "../pulses/pxx.h"
 
-class ModuleFifo : public Fifo<uint8_t, PXX2_FRAME_MAXLENGTH> {
+class ModuleFifo : public Fifo<uint8_t, 2*PXX2_FRAME_MAXLENGTH> {
   public:
     bool getFrame(uint8_t * frame)
     {