diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index ff1dde397..d6a25c048 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -26,6 +26,10 @@ set(RAMBACKUP YES)
 set(LUA YES)
 set(PPM_LIMITS_SYMETRICAL YES)
 
+if(SPLASH STREQUAL OFF)
+  message(FATAL_ERROR "Option SPLASH=OFF not supported on Horus")
+endif()
+
 add_definitions(-DPCBHORUS -DPCBREV=${PCBREV} -DSTM32F429_439xx -DSDRAM -DCOLORLCD -DPPM_PIN_UART -DPPM_PIN_TIMER)
 add_definitions(-DEEPROM_VARIANT=0 -DAUDIO -DVOICE -DRTCLOCK)
 add_definitions(-DGPS_USART_BAUDRATE=${INTERNAL_GPS_BAUDRATE})
diff --git a/radio/src/targets/taranis/CMakeLists.txt b/radio/src/targets/taranis/CMakeLists.txt
index 336682888..9a68ab83f 100644
--- a/radio/src/targets/taranis/CMakeLists.txt
+++ b/radio/src/targets/taranis/CMakeLists.txt
@@ -77,6 +77,10 @@ set(EEPROM EEPROM_RLC)
 set(TARGET_DIR taranis)
 set(PPM_LIMITS_SYMETRICAL YES)
 
+if(SPLASH STREQUAL OFF)
+  message(FATAL_ERROR "Option SPLASH=OFF not supported on Taranis")
+endif()
+
 add_definitions(-DPCBTARANIS -DPPM_PIN_TIMER)
 add_definitions(-DAUDIO -DVOICE -DRTCLOCK)