diff --git a/Code/Mantid/MantidQt/SliceViewer/src/PhysicalCrossPeak.cpp b/Code/Mantid/MantidQt/SliceViewer/src/PhysicalCrossPeak.cpp
index a614badde4088780eb72a98f1711209a935acb5b..79a194dee6978e79c3ae59f1545bf5ada1249eff 100644
--- a/Code/Mantid/MantidQt/SliceViewer/src/PhysicalCrossPeak.cpp
+++ b/Code/Mantid/MantidQt/SliceViewer/src/PhysicalCrossPeak.cpp
@@ -64,7 +64,7 @@ namespace MantidQt
   */
   MantidQt::SliceViewer::CrossPeakPrimitives PhysicalCrossPeak::draw(const double& windowHeight, const double& windowWidth) const
   {
-    CrossPeakPrimitives drawingObjects;
+    CrossPeakPrimitives drawingObjects = {};
     if(isViewable())
     {
       const int halfCrossHeight = int(windowHeight * m_crossViewFraction);
diff --git a/Code/Mantid/MantidQt/SliceViewer/src/PhysicalSphericalPeak.cpp b/Code/Mantid/MantidQt/SliceViewer/src/PhysicalSphericalPeak.cpp
index 71a4904500e035e8b00e7544ec10b652f01c8e83..d6e5240f04667fdc216322c16810da4c21312eeb 100644
--- a/Code/Mantid/MantidQt/SliceViewer/src/PhysicalSphericalPeak.cpp
+++ b/Code/Mantid/MantidQt/SliceViewer/src/PhysicalSphericalPeak.cpp
@@ -84,7 +84,7 @@ namespace MantidQt
       */
       MantidQt::SliceViewer::SphericalPeakPrimitives PhysicalSphericalPeak::draw(const double& windowHeight, const double& windowWidth, const double& viewWidth, const double& viewHeight) const
       {
-        SphericalPeakPrimitives drawingObjects;
+          SphericalPeakPrimitives drawingObjects = {};
         if(this->isViewable())
         {
           // Scale factor for going from viewX to windowX