diff --git a/radio/src/targets/simu/CMakeLists.txt b/radio/src/targets/simu/CMakeLists.txt
index e7c1dfefe..0bbebff0f 100644
--- a/radio/src/targets/simu/CMakeLists.txt
+++ b/radio/src/targets/simu/CMakeLists.txt
@@ -7,16 +7,17 @@ set(SIMU_SRC ${SIMU_SRC} simpgmspace.cpp)
 add_definitions(-DSIMU -g)
 remove_definitions(-DCLI)
 
-string(TOLOWER ${TRANSLATIONS} TRANSLATION_LOWERCASE)
-set(SIMULATOR_FLAVOUR opentx-${FLAVOUR}-${TRANSLATION_LOWERCASE})
-set(SIMULATOR_TARGET ${SIMULATOR_FLAVOUR}-simulator)
-add_definitions(-DSIMULATOR_FLAVOUR="${SIMULATOR_FLAVOUR}")
-include_directories(${COMPANION_SRC_DIRECTORY} ${COMPANION_SRC_DIRECTORY}/simulation)
-add_library(${SIMULATOR_TARGET} SHARED ${SIMU_SRC} opentxsimulator.cpp)
-add_dependencies(${SIMULATOR_TARGET} ${FIRMWARE_DEPENDENCIES})
-qt5_use_modules(${SIMULATOR_TARGET} Core)
-
-add_custom_target(opentx-simulator DEPENDS ${SIMULATOR_TARGET})
+if(Qt5Widgets_FOUND)
+  string(TOLOWER ${TRANSLATIONS} TRANSLATION_LOWERCASE)
+  set(SIMULATOR_FLAVOUR opentx-${FLAVOUR}-${TRANSLATION_LOWERCASE})
+  set(SIMULATOR_TARGET ${SIMULATOR_FLAVOUR}-simulator)
+  add_definitions(-DSIMULATOR_FLAVOUR="${SIMULATOR_FLAVOUR}")
+  include_directories(${COMPANION_SRC_DIRECTORY} ${COMPANION_SRC_DIRECTORY}/simulation)
+  add_library(${SIMULATOR_TARGET} SHARED ${SIMU_SRC} opentxsimulator.cpp)
+  add_dependencies(${SIMULATOR_TARGET} ${FIRMWARE_DEPENDENCIES})
+  qt5_use_modules(${SIMULATOR_TARGET} Core)
+  add_custom_target(opentx-simulator DEPENDS ${SIMULATOR_TARGET})
+endif()
 
 if(NOT WIN32)
   add_executable(simu WIN32 ${SIMU_SRC} ../../simu.cpp)