diff --git a/Dockerfile.trunk b/Dockerfile.trunk
index 4183dd75aede15b98a4d5ff5be436677747274f5..d100fa5386a3a1e114b577c98aa2a5646dd5db63 100644
--- a/Dockerfile.trunk
+++ b/Dockerfile.trunk
@@ -35,7 +35,6 @@ RUN mkdir /quassel/build && \
       -GNinja \
       -DCMAKE_INSTALL_PREFIX=/quassel/install \
       -DCMAKE_BUILD_TYPE="Release" \
-      -DUSE_QT5=ON \
       -DWITH_KDE=OFF \
       -DWANT_QTCLIENT=OFF \
       -DWANT_CORE=ON \