diff --git a/Docker/pulp-base/Dockerfile b/Docker/pulp-base/Dockerfile
index c98476203c8db6332a18416e0c19d9647b1a52e2..b5ca01c4b4d52b61d61c4ce3987fecb402da99ca 100644
--- a/Docker/pulp-base/Dockerfile
+++ b/Docker/pulp-base/Dockerfile
@@ -232,7 +232,7 @@ RUN cd ${INSTALLDIR}/src/tempo2 && sudo TEMPO2=${TEMPO2} ./configure --prefix=/u
 # *******************
 #
 RUN cd ${INSTALLDIR}/src && sudo wget --retry-connrefused http://www.atnf.csiro.au/people/pulsar/psrcat/downloads/psrcat_pkg.tar.gz && \
-    sudo tar xvfz psrcat_pkg.tar.gz && cd psrcat_tar && sudo source makeit && cd ${INSTALLDIR}/lib && \
+    sudo tar xvfz psrcat_pkg.tar.gz && cd psrcat_tar && sudo /bin/sh makeit && cd ${INSTALLDIR}/lib && \
     sudo ln -sf ${INSTALLDIR}/src/psrcat_tar/libpsrcat.a . && cd ${INSTALLDIR}/bin && \
     sudo ln -sf ${INSTALLDIR}/src/psrcat_tar/psrcat . && sudo ln -sf ${INSTALLDIR}/src/psrcat_tar/psrcat.db . && \
     sudo ln -sf ${INSTALLDIR}/src/psrcat_tar/glitch.db .