diff --git a/buildconfig/CMake/Packaging/launch_mantidworkbench.sh.in b/buildconfig/CMake/Packaging/launch_mantidworkbench.sh.in
index 80b3c3d06cf2b60b47596ed1254ca65167b3c461..0a0b7b90748554709937326f4a9d9c87399a652f 100644
--- a/buildconfig/CMake/Packaging/launch_mantidworkbench.sh.in
+++ b/buildconfig/CMake/Packaging/launch_mantidworkbench.sh.in
@@ -21,7 +21,7 @@ if [ -n "${LD_LIBRARY_PATH}" ]; then
   LOCAL_LDPATH=${LOCAL_LDPATH}:${LD_LIBRARY_PATH}
 fi
 # define where python libraries are
-LOCAL_PYTHONPATH=@LOCAL_PYPATH@:${INSTALLDIR}/lib/mantidqt@PARAVIEW_PYTHON_PATHS@
+LOCAL_PYTHONPATH=@LOCAL_PYPATH@@PARAVIEW_PYTHON_PATHS@
 if [ -n "${PYTHONPATH}" ]; then
     LOCAL_PYTHONPATH=${LOCAL_PYTHONPATH}:${PYTHONPATH}
 fi
diff --git a/qt/python/mantidqt/widgets/workspacewidget/workspacetreewidget.py b/qt/python/mantidqt/widgets/workspacewidget/workspacetreewidget.py
index f8fee5faa670f553f8595f478f3c8bcfede1c4c5..fbb7909906199c03ac31c44a3635f487a6f71d2f 100644
--- a/qt/python/mantidqt/widgets/workspacewidget/workspacetreewidget.py
+++ b/qt/python/mantidqt/widgets/workspacewidget/workspacetreewidget.py
@@ -24,5 +24,5 @@ from __future__ import (absolute_import, unicode_literals)
 from mantidqt.utils.qt import import_qt
 
 
-WorkspaceTreeWidget = import_qt('.._common', 'mantidqt.widgets.workspacewidget',
+WorkspaceTreeWidget = import_qt('..._common', 'mantidqt.widgets.workspacewidget',
                                 'WorkspaceTreeWidgetSimple')