diff --git a/Docker/lofar-ci/Dockerfile_ci_mac b/Docker/lofar-ci/Dockerfile_ci_mac
index b578a720c021a0bf3cc3631aaf7eb8325083eb7b..e6ff778ff30725db80b7c20586ab1033f9002b52 100644
--- a/Docker/lofar-ci/Dockerfile_ci_mac
+++ b/Docker/lofar-ci/Dockerfile_ci_mac
@@ -18,7 +18,7 @@ RUN echo "Installing Casacore..." && \
     make install
 
 RUN echo "Installing Blitz++" && \
-    cd /
+    cd / && \
     git clone --depth 1 https://github.com/blitzpp/blitz.git && \
     mkdir -p /blitz/build && \
     cd /blitz/build && \