diff --git a/radio/src/sdcard.h b/radio/src/sdcard.h
index 2b86198a4..853a4b822 100644
--- a/radio/src/sdcard.h
+++ b/radio/src/sdcard.h
@@ -133,7 +133,6 @@ const char * getBasename(const char * path);
   #define OTX_FOURCC 0x3B78746F // otx 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(RADIO_X7)
   #define OTX_FOURCC 0x3678746F // otx for Taranis X7
 #elif defined(PCBX9LITE)
@@ -142,10 +141,8 @@ const char * getBasename(const char * path);
   #define OTX_FOURCC 0x3378746F // otx for Taranis X9D
 #elif defined(PCBSKY9X)
   #define OTX_FOURCC 0x3278746F // otx for sky9x
-  #define O9X_FOURCC 0x3278396F // o9x for sky9x
 #elif defined(RADIO_T12)
   #define OTX_FOURCC 0x3D78746F // otx for Jumper T12
-  #define O9X_FOURCC 0x3D78396F // o9x for Jumper T12
 #endif
 
 bool isFileAvailable(const char * filename, bool exclDir = false);