diff --git a/radio/src/pulses/pxx2.cpp b/radio/src/pulses/pxx2.cpp
index e72caaa66..fff25f72d 100644
--- a/radio/src/pulses/pxx2.cpp
+++ b/radio/src/pulses/pxx2.cpp
@@ -18,6 +18,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdio.h>
 #include "opentx.h"
 #include "pulses/pxx2.h"
 #include "io/frsky_firmware_update.h"