diff --git a/cmake/QtBuild.cmake b/cmake/QtBuild.cmake
index 87c126459d..62c0d66561 100644
--- a/cmake/QtBuild.cmake
+++ b/cmake/QtBuild.cmake
@@ -2300,7 +2300,11 @@ endfunction()
 
 # Sets QT_WILL_BUILD_TOOLS if tools will be built.
 function(qt_check_if_tools_will_be_built)
-    set(will_build_tools NOT CMAKE_CROSSCOMPILING AND NOT QT_FORCE_FIND_TOOLS)
+    if(NOT CMAKE_CROSSCOMPILING AND NOT QT_FORCE_FIND_TOOLS)
+        set(will_build_tools TRUE)
+    else()
+        set(will_build_tools FALSE)
+    endif()
     set(QT_WILL_BUILD_TOOLS ${will_build_tools} CACHE INTERNAL "Are tools going to be built" FORCE)
 endfunction()