diff --git a/Framework/Algorithms/src/GetAllEi.cpp b/Framework/Algorithms/src/GetAllEi.cpp
index 2e39f9055468f443efdc43e73a901201e4d87619..60418d5071ea437e50237e3f826e2d099efadc9e 100644
--- a/Framework/Algorithms/src/GetAllEi.cpp
+++ b/Framework/Algorithms/src/GetAllEi.cpp
@@ -444,7 +444,7 @@ bool GetAllEi::peakGuess(const API::MatrixWorkspace_sptr &inputWS, size_t index,
 
   double sMin(std::numeric_limits<double>::max());
   double sMax(-sMin);
-  double xOfMax, dXmax;
+  double xOfMax(0), dXmax(0);
   double Intensity(0);
 
   auto X = inputWS->readX(index);