diff --git a/radio/src/sdcard.h b/radio/src/sdcard.h
index ca3b9437d..2ac0e6e77 100644
--- a/radio/src/sdcard.h
+++ b/radio/src/sdcard.h
@@ -121,34 +121,24 @@ inline const char * SDCARD_ERROR(FRESULT result)
 const char * getFileExtension(const char * filename, uint8_t size=0, uint8_t extMaxLen=0, uint8_t *fnlen=NULL, uint8_t *extlen=NULL);
 const char * getBasename(const char * path);
 
-// TODO REMOVE THE O9X FOURCC in 2.3
 #if defined(PCBX12S)
   #define OTX_FOURCC 0x3478746F // otx for X12S
-  #define O9X_FOURCC 0x3178396F // we forgot it in 2.2 RC ..
 #elif defined(PCBX10)
   #define OTX_FOURCC 0x3778746F // otx for X10
-  #define O9X_FOURCC 0x3478746F // match X12S, we forgot OTX_FOURCC before 2.2.1 RC2
 #elif defined(PCBX9E)
   #define OTX_FOURCC 0x3578746F // otx for Taranis X9E
-  #define O9X_FOURCC 0x3378396F // o9x for Taranis X9E
 #elif defined(PCBXLITES)
   #define OTX_FOURCC 0x3B78746F // otx for Taranis X-Lite S
-  #define O9X_FOURCC 0x3B78396F // o9x for Taranis X-Lite S
 #elif defined(PCBXLITE)
   #define OTX_FOURCC 0x3978746F // otx for Taranis X-Lite
-  #define O9X_FOURCC 0x3978396F // o9x for Taranis X-Lite
 #elif defined(PCBX7)
   #define OTX_FOURCC 0x3678746F // otx for Taranis X7
-  #define O9X_FOURCC 0x3378396F // o9x for Taranis X7
 #elif defined(PCBX9LITE)
   #define OTX_FOURCC 0x3C78746F // otx for Taranis X9-Lite
-  #define O9X_FOURCC 0x3C78396F // o9x for Taranis X9-Lite
 #elif defined(PCBX9D) || defined(PCBX9DP)
   #define OTX_FOURCC 0x3378746F // otx for Taranis X9D
-  #define O9X_FOURCC 0x3378396F // o9x for Taranis X9D
 #elif defined(PCBSKY9X)
   #define OTX_FOURCC 0x3278746F // otx for sky9x
-  #define O9X_FOURCC 0x3278396F // o9x for sky9x
 #endif
 
 bool isFileAvailable(const char * filename, bool exclDir = false);
diff --git a/radio/src/storage/eeprom_raw.cpp b/radio/src/storage/eeprom_raw.cpp
index 2e93a6a70..3e286ec49 100644
--- a/radio/src/storage/eeprom_raw.cpp
+++ b/radio/src/storage/eeprom_raw.cpp
@@ -538,7 +538,7 @@ const char * eeRestoreModel(uint8_t i_fileDst, char *model_name)
   }
 
   uint8_t version = (uint8_t)buf[4];
-  if ((*(uint32_t*)&buf[0] != OTX_FOURCC && *(uint32_t*)&buf[0] != O9X_FOURCC) || version < FIRST_CONV_EEPROM_VER || version > EEPROM_VER || buf[5] != 'M') {
+  if (*(uint32_t*)&buf[0] != OTX_FOURCC || version < FIRST_CONV_EEPROM_VER || version > EEPROM_VER || buf[5] != 'M') {
     f_close(&restoreFile);
     return STR_INCOMPATIBLE;
   }
diff --git a/radio/src/storage/eeprom_rlc.cpp b/radio/src/storage/eeprom_rlc.cpp
index bf1e18587..4bed375d9 100644
--- a/radio/src/storage/eeprom_rlc.cpp
+++ b/radio/src/storage/eeprom_rlc.cpp
@@ -557,7 +557,7 @@ const char * eeRestoreModel(uint8_t i_fileDst, char *model_name)
   }
 
   uint8_t version = (uint8_t)buf[4];
-  if ((*(uint32_t*)&buf[0] != OTX_FOURCC && *(uint32_t*)&buf[0] != O9X_FOURCC) || version < FIRST_CONV_EEPROM_VER || version > EEPROM_VER || buf[5] != 'M') {
+  if (*(uint32_t*)&buf[0] != OTX_FOURCC || version < FIRST_CONV_EEPROM_VER || version > EEPROM_VER || buf[5] != 'M') {
     f_close(&g_oLogFile);
     return STR_INCOMPATIBLE;
   }
diff --git a/radio/src/storage/sdcard_raw.cpp b/radio/src/storage/sdcard_raw.cpp
index 4917a0c22..c0b129fc8 100644
--- a/radio/src/storage/sdcard_raw.cpp
+++ b/radio/src/storage/sdcard_raw.cpp
@@ -92,7 +92,7 @@ const char * openFile(const char * fullpath, FIL * file, uint16_t * size, uint8_
   }
 
   *version = (uint8_t)buf[4];
-  if ((*(uint32_t*)&buf[0] != OTX_FOURCC && *(uint32_t*)&buf[0] != O9X_FOURCC) || *version < FIRST_CONV_EEPROM_VER || *version > EEPROM_VER || buf[5] != 'M') {
+  if (*(uint32_t*)&buf[0] != OTX_FOURCC || *version < FIRST_CONV_EEPROM_VER || *version > EEPROM_VER || buf[5] != 'M') {
     f_close(file);
     return STR_INCOMPATIBLE;
   }