diff --git a/Code/Mantid/Kernel/src/ConfigService.cpp b/Code/Mantid/Kernel/src/ConfigService.cpp
index 0803a3685386653657ee48be067492e813d0c8ac..9de7a2e8e6be15aa42e3988970145b506266b5f0 100644
--- a/Code/Mantid/Kernel/src/ConfigService.cpp
+++ b/Code/Mantid/Kernel/src/ConfigService.cpp
@@ -147,6 +147,7 @@ ConfigServiceImpl::ConfigServiceImpl() :
 
   //Fill the list of possible relative path keys that may require conversion to absolute paths
   m_ConfigPaths.insert(std::make_pair("plugins.directory", true));
+  m_ConfigPaths.insert(std::make_pair("mantidqt.plugins.directory", true));
   m_ConfigPaths.insert(std::make_pair("instrumentDefinition.directory", true));
   m_ConfigPaths.insert(std::make_pair("requiredpythonscript.directories", true));
   m_ConfigPaths.insert(std::make_pair("pythonscripts.directory", true));