diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index 934910799..ff1dde397 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -24,6 +24,7 @@ set(LUA_EXPORT lua_export_horus)
 set(FLAVOUR horus)
 set(RAMBACKUP YES)
 set(LUA YES)
+set(PPM_LIMITS_SYMETRICAL YES)
 
 add_definitions(-DPCBHORUS -DPCBREV=${PCBREV} -DSTM32F429_439xx -DSDRAM -DCOLORLCD -DPPM_PIN_UART -DPPM_PIN_TIMER)
 add_definitions(-DEEPROM_VARIANT=0 -DAUDIO -DVOICE -DRTCLOCK)
diff --git a/radio/src/targets/sky9x/CMakeLists.txt b/radio/src/targets/sky9x/CMakeLists.txt
index 7b8dbb253..084e19568 100644
--- a/radio/src/targets/sky9x/CMakeLists.txt
+++ b/radio/src/targets/sky9x/CMakeLists.txt
@@ -7,6 +7,7 @@ set(EEPROM EEPROM_RAW)
 set(GUI_DIR 128x64)
 set(TARGET_DIR sky9x)
 set(FIRMWARE_DEPENDENCIES ${FIRMWARE_DEPENDENCIES} 9x_bitmaps)
+set(PPM_LIMITS_SYMETRICAL YES)
 
 if(PCB STREQUAL 9XRPRO)
   add_definitions(-Dat91sam3s8 -DREVX)
diff --git a/radio/src/targets/taranis/CMakeLists.txt b/radio/src/targets/taranis/CMakeLists.txt
index 207fc5dc0..336682888 100644
--- a/radio/src/targets/taranis/CMakeLists.txt
+++ b/radio/src/targets/taranis/CMakeLists.txt
@@ -75,6 +75,7 @@ set(HSE_VALUE 12000000)
 set(SDCARD YES)
 set(EEPROM EEPROM_RLC)
 set(TARGET_DIR taranis)
+set(PPM_LIMITS_SYMETRICAL YES)
 
 add_definitions(-DPCBTARANIS -DPPM_PIN_TIMER)
 add_definitions(-DAUDIO -DVOICE -DRTCLOCK)