diff --git a/Docker/lofar-ci/Dockerfile_ci_mac b/Docker/lofar-ci/Dockerfile_ci_mac
index 367340fda600ac42a6529cf893a2d63af72ce36b..9f7634f43164ef0828171a6e969216700712f12c 100644
--- a/Docker/lofar-ci/Dockerfile_ci_mac
+++ b/Docker/lofar-ci/Dockerfile_ci_mac
@@ -35,7 +35,7 @@ RUN echo "Installing Casacore..." && \
     mkdir -p /opt/3rdparty_sources/ && cd /opt/3rdparty_sources/ && \
     git clone --branch v2.1.0 https://github.com/casacore/casacore.git casacore && \
     mkdir casacore/build/ && cd casacore/build/ && \
-    cmake -DCMAKE_INSTALL_PREFIX=/opt/casacore -DBUILD_PYTHON3=ON -DBUILD_PYTHON=OFF -DPYTHON_EXECUTABLE=/usr/bin/python3 -DUSE_OPENMP=ON -DUSE_FFTW3=TRUE -DUSE_HDF5=ON -DCMAKE_BUILD_TYPE=Release .. && \
+    cmake -DCMAKE_INSTALL_PREFIX=/opt/casacore -DBUILD_PYTHON3=OFF -DBUILD_PYTHON=OFF -DPYTHON_EXECUTABLE=/usr/bin/python3 -DUSE_OPENMP=ON -DUSE_FFTW3=TRUE -DUSE_HDF5=ON -DCMAKE_BUILD_TYPE=Release .. && \
     make -j 8 && \
     make install