diff --git a/Code/Mantid/Framework/DataHandling/src/LoadVulcanCalFile.cpp b/Code/Mantid/Framework/DataHandling/src/LoadVulcanCalFile.cpp
index 33a90fb93bc0..fbcebd492a30 100644
--- a/Code/Mantid/Framework/DataHandling/src/LoadVulcanCalFile.cpp
+++ b/Code/Mantid/Framework/DataHandling/src/LoadVulcanCalFile.cpp
@@ -38,7 +38,11 @@ const size_t NUMBERRESERVEDPERMODULE = 1250;
 //----------------------------------------------------------------------------------------------
 /** Constructor
  */
-LoadVulcanCalFile::LoadVulcanCalFile() : m_doAlignEventWS(false) {}
+LoadVulcanCalFile::LoadVulcanCalFile() : m_instrument(),
+    m_groupingType(VULCAN_OFFSET_BANK),  m_offsetFilename(""),
+    m_badPixFilename(""), m_tofOffsetsWS(), m_offsetsWS(), m_groupWS(),
+    m_maskWS(), m_doAlignEventWS(false), m_eventWS(), m_effLTheta() {
+}
 
 //----------------------------------------------------------------------------------------------
 /** Destructor