diff --git a/radio/src/CMakeLists.txt b/radio/src/CMakeLists.txt
index 61db95377..989457f92 100644
--- a/radio/src/CMakeLists.txt
+++ b/radio/src/CMakeLists.txt
@@ -52,7 +52,6 @@ option(MODULE_PROTOCOL_FCC "Add support for FCC modules" ON)
 option(MODULE_PROTOCOL_LBT "Add support for EU/LBT modules" ON)
 option(MODULE_PROTOCOL_FLEX "Add support for non certified FLEX modules" OFF)
 option(MODULE_PROTOCOL_D8 "Add support for D8 modules" ON)
-option(OTX_RELEASE "Used to build OpenTX released firmware" OFF)
 option(FRSKY_RELEASE "Used to build FrSky released firmware" OFF)
 option(TBS_RELEASE "Used to build TBS released firmware" OFF)
 option(ALLOW_TRAINER_MULTI "Allow multi trainer" OFF)
@@ -337,10 +336,6 @@ if(MODULE_PROTOCOL_D8)
   add_definitions(-DMODULE_PROTOCOL_D8)
 endif()
 
-if(OTX_RELEASE)
-  add_definitions(-DOTX_RELEASE)
-endif()
-
 if(JUMPER_RELEASE)
   add_definitions(-DJUMPER_RELEASE)
 endif()
diff --git a/radio/src/stamp.cpp b/radio/src/stamp.cpp
index 06b601b69..0c90f5c71 100644
--- a/radio/src/stamp.cpp
+++ b/radio/src/stamp.cpp
@@ -40,8 +40,6 @@
 #define DISPLAY_VERSION "-radiomaster"
 #elif defined(TBS_RELEASE)
 #define DISPLAY_VERSION "-tbs"
-#elif defined(OTX_RELEASE)
-#define DISPLAY_VERSION "-otx"
 #else
 #define DISPLAY_VERSION
 #endif