--- a/src/doc/CMakeLists.txt	2024-09-06 07:36:34.000000000 +0200
+++ b/src/doc/CMakeLists.txt	2024-10-13 20:41:26.450802361 +0200
@@ -32,13 +32,15 @@
     endif()
   endif()
   if(COIN_BUILD_DOCUMENTATION_QTHELP)
-    find_program(QHG_LOCATION NAMES qhelpgenerator qhelpgenerator-qt5 DOC "Qt qhelpgenerator")
-    if(NOT QHG_LOCATION)
-      message(FATAL_ERROR "Missing program Qt qhelpgenerator")
+    find_package(Qt6Tools QUIET COMPONENTS Help)
+    if(Qt6Tools_FOUND)
+      get_target_property(QHG_LOCATION Qt6::qhelpgenerator LOCATION)
     else()
-      set(GENERATE_QHP YES)
-      mark_as_advanced(QHG_LOCATION)
+      find_package(Qt5Help REQUIRED)
+      get_target_property(QHG_LOCATION Qt5::qhelpgenerator LOCATION)
     endif()
+    set(GENERATE_QHP YES)
+    mark_as_advanced(QHG_LOCATION)
   endif()
 
   # Add default files