diff --git a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
index 296ea2cd3b..dce981e059 100644
--- a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+++ b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
@@ -163,6 +163,8 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
         set(_Qt5$${CMAKE_MODULE_NAME}_FIND_VERSION_EXACT EXACT)
     endif()
 
+    set(Qt5$${CMAKE_MODULE_NAME}_EXECUTABLE_COMPILE_FLAGS \"\")
+
     foreach(_module_dep ${_Qt5$${CMAKE_MODULE_NAME}_MODULE_DEPENDENCIES})
         if (NOT Qt5${_module_dep}_FOUND)
             find_package(Qt5${_module_dep}
@@ -188,9 +190,7 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
     list(REMOVE_DUPLICATES Qt5$${CMAKE_MODULE_NAME}_PRIVATE_INCLUDE_DIRS)
     list(REMOVE_DUPLICATES Qt5$${CMAKE_MODULE_NAME}_DEFINITIONS)
     list(REMOVE_DUPLICATES Qt5$${CMAKE_MODULE_NAME}_COMPILE_DEFINITIONS)
-    if (Qt5$${CMAKE_MODULE_NAME}_EXECUTABLE_COMPILE_FLAGS)
-        list(REMOVE_DUPLICATES Qt5$${CMAKE_MODULE_NAME}_EXECUTABLE_COMPILE_FLAGS)
-    endif()
+    list(REMOVE_DUPLICATES Qt5$${CMAKE_MODULE_NAME}_EXECUTABLE_COMPILE_FLAGS)
 
     set(_Qt5$${CMAKE_MODULE_NAME}_LIB_DEPENDENCIES \"$${CMAKE_QT5_MODULE_DEPS}\")