diff --git a/src/Mod/Sandbox/Gui/CMakeLists.txt b/src/Mod/Sandbox/Gui/CMakeLists.txt
index 67431d322b..0af92b6efd 100644
--- a/src/Mod/Sandbox/Gui/CMakeLists.txt
+++ b/src/Mod/Sandbox/Gui/CMakeLists.txt
@@ -43,7 +43,7 @@ SOURCE_GROUP("Moc" FILES ${SandboxGui_MOC_SRCS})
 if(BUILD_QT5)
     qt5_add_resources(Resource_SRCS Resources/Sandbox.qrc)
 else()
-    qt4_add_resources(Resource_SRCS Resources/Sandbox.qrc)
+    qt6_add_resources(Resource_SRCS Resources/Sandbox.qrc)
 endif()
 SET(Resource_SRCS
     ${Resource_SRCS}