diff --git a/radio/src/bluetooth.cpp b/radio/src/bluetooth.cpp
index d5669af53..147158ca4 100644
--- a/radio/src/bluetooth.cpp
+++ b/radio/src/bluetooth.cpp
@@ -18,6 +18,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdio.h>
 #include "opentx.h"
 #include "io/frsky_firmware_update.h"
 
diff --git a/radio/src/gui/common/stdlcd/radio_sdmanager.cpp b/radio/src/gui/common/stdlcd/radio_sdmanager.cpp
index e8bdf849b..3a84c6a2f 100644
--- a/radio/src/gui/common/stdlcd/radio_sdmanager.cpp
+++ b/radio/src/gui/common/stdlcd/radio_sdmanager.cpp
@@ -18,6 +18,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdio.h>
 #include "opentx.h"
 #include "io/frsky_firmware_update.h"
 #include "io/multi_firmware_update.h"
diff --git a/radio/src/io/bootloader_flash.cpp b/radio/src/io/bootloader_flash.cpp
index 18ae9b272..20a7947de 100644
--- a/radio/src/io/bootloader_flash.cpp
+++ b/radio/src/io/bootloader_flash.cpp
@@ -18,6 +18,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdio.h>
 #include "opentx.h"
 #include "bootloader_flash.h"
 
diff --git a/radio/src/io/frsky_firmware_update.cpp b/radio/src/io/frsky_firmware_update.cpp
index d46316c98..6ae866c7a 100644
--- a/radio/src/io/frsky_firmware_update.cpp
+++ b/radio/src/io/frsky_firmware_update.cpp
@@ -18,6 +18,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdio.h>
 #include "opentx.h"
 #include "frsky_firmware_update.h"
 
diff --git a/radio/src/io/multi_firmware_update.cpp b/radio/src/io/multi_firmware_update.cpp
index d81c94ace..8e60eace2 100644
--- a/radio/src/io/multi_firmware_update.cpp
+++ b/radio/src/io/multi_firmware_update.cpp
@@ -20,6 +20,7 @@
 
 #if !defined(DISABLE_MULTI_UPDATE)
 
+#include <stdio.h>
 #include "opentx.h"
 #include "multi_firmware_update.h"
 #include "stk500.h"
diff --git a/radio/src/sdcard.cpp b/radio/src/sdcard.cpp
index 398fa477e..37f858c55 100644
--- a/radio/src/sdcard.cpp
+++ b/radio/src/sdcard.cpp
@@ -18,6 +18,7 @@
  * GNU General Public License for more details.
  */
 
+#include <stdio.h>
 #include <stdint.h>
 #include "opentx.h"
 #include "diskio.h"