diff --git a/Dockerfile-ubuntu26-qt6.dockerfile b/Dockerfile-ubuntu26-qt6.dockerfile
index c05c809..e3b7adc 100644
--- a/Dockerfile-ubuntu26-qt6.dockerfile
+++ b/Dockerfile-ubuntu26-qt6.dockerfile
@@ -96,7 +96,7 @@ RUN python3 -m venv /opt/venv \
 RUN set -eux; \
     mkdir -p "${QT_BASE_DIR}" \
     && /opt/venv/bin/python -m aqt install-qt linux desktop "${QT_VERSION}" "${QT_ARCH}" \
-        -m qtmultimedia qtserialport qtimageformats qtwebsockets qtpdf qtwebview qtlocation qtpositioning \
+        -m qtmultimedia qtserialport qtimageformats qtwebsockets qtpdf qtwebview qtlocation qtpositioning qt5compat \
         --outputdir "${QT_BASE_DIR}" \
     && test -f "${QT_ROOT}/lib/cmake/Qt6/Qt6Config.cmake"