diff --git a/Code/Mantid/MantidQt/SliceViewer/src/ConcretePeaksPresenter.cpp b/Code/Mantid/MantidQt/SliceViewer/src/ConcretePeaksPresenter.cpp
index ff06ae2c0291..cd400592d082 100644
--- a/Code/Mantid/MantidQt/SliceViewer/src/ConcretePeaksPresenter.cpp
+++ b/Code/Mantid/MantidQt/SliceViewer/src/ConcretePeaksPresenter.cpp
@@ -28,11 +28,11 @@ namespace MantidQt
     {
       switch(coordSystem)
       {
-      case QLab:
+      case Mantid::API::QLab:
         return "QLab";
-      case QSample:
+      case Mantid::API::QSample:
         return "QSample";
-      case HKL:
+      case Mantid::API::HKL:
         return "HKL";
       default:
         return "Unknown";