diff --git a/ms-windows/osgeo4w/package-nightly.cmd b/ms-windows/osgeo4w/package-nightly.cmd
index 8d9a2c70d52..b65094fea2f 100644
--- a/ms-windows/osgeo4w/package-nightly.cmd
+++ b/ms-windows/osgeo4w/package-nightly.cmd
@@ -237,6 +237,7 @@ for %%g IN (%GRASS_VERSIONS%) do (
 	set GISBASE=%OSGEO4W_ROOT%\apps\grass\grass-%%g
 )
 PATH %path%;%BUILDDIR%\output\plugins\%BUILDCONF%
+set QT_PLUGIN_PATH=%OSGEO4W_ROOT%\output\plugins;%OSGEO4W_ROOT%\apps\qt5\plugins
 
 cmake --build %BUILDDIR% --target Nightly --config %BUILDCONF%
 if errorlevel 1 echo TESTS WERE NOT SUCCESSFUL.