diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 39cdf8bf07..f0ed33b0bc 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -82,7 +82,7 @@ if(NO_WARN)
     endif()
 endif()
 
-# QtViewer requires Qt5
+# QtViewer requires Qt6
 OPTION(BUILD_QTVIEWER "Build IfcOpenShell Qt GUI Viewer" OFF)
 include(GNUInstallDirs)
 if((BUILD_CONVERT OR BUILD_GEOMSERVER OR BUILD_IFCPYTHON) AND (NOT BUILD_IFCGEOM))