diff --git a/Framework/DataHandling/inc/MantidDataHandling/LoadBinaryStl.h b/Framework/DataHandling/inc/MantidDataHandling/LoadBinaryStl.h
index 60241c48c4599a06840c8fde9d78cbd9aa00537a..1d921f26571668d4e1dfeb0e4c045f75271b2664 100644
--- a/Framework/DataHandling/inc/MantidDataHandling/LoadBinaryStl.h
+++ b/Framework/DataHandling/inc/MantidDataHandling/LoadBinaryStl.h
@@ -1,5 +1,5 @@
-#ifndef MANTID_DATAHANDLING_LOADBinaryStl_H_
-#define MANTID_DATAHANDLING_LOADBinaryStl_H_
+#ifndef MANTID_DATAHANDLING_LOADBINARYSTL_H_
+#define MANTID_DATAHANDLING_LOADBINARYSTL_H_
 #include "MantidGeometry/Objects/MeshObject.h"
 #include "MantidKernel/BinaryStreamReader.h"
 #include <MantidKernel/V3D.h>
@@ -9,9 +9,10 @@ namespace DataHandling {
 
 class DLLExport LoadBinaryStl {
 public:
-  LoadBinaryStl(std::string filename)
-      : m_filename(filename), M_HEADER_SIZE(80), M_SIZE_OF_TRIANGLE(50),
-        M_NUM_OF_TRIANGLES(4) {}
+  static constexpr int HEADER_SIZE = 80;
+  static constexpr uint32_t SIZE_OF_TRIANGLE = 50;
+  static constexpr uint32_t NUM_OF_TRIANGLES = 4;
+  LoadBinaryStl(std::string filename) : m_filename(filename){}
   std::unique_ptr<Geometry::MeshObject> readStl();
   bool isBinarySTL();
 
@@ -22,13 +23,10 @@ private:
 
   std::vector<uint16_t> m_triangle;
   std::vector<Kernel::V3D> m_verticies;
-  const int M_HEADER_SIZE;
-  const uint32_t M_SIZE_OF_TRIANGLE;
-  const uint32_t M_NUM_OF_TRIANGLES;
 };
 uint16_t addSTLVertex(Kernel::V3D &vertex, std::vector<Kernel::V3D> &vertices);
 bool areEqualVertices(Kernel::V3D const &v1, Kernel::V3D const &v2);
 
 } // namespace DataHandling
 } // namespace Mantid
-#endif /* MANTID_DATAHANDLING_LOADBinaryStl_H_ */
\ No newline at end of file
+#endif /* MANTID_DATAHANDLING_LOADBINARYSTL_H_ */
\ No newline at end of file
diff --git a/Framework/DataHandling/src/LoadBinaryStl.cpp b/Framework/DataHandling/src/LoadBinaryStl.cpp
index 5a2885442dc26f6f2b4237ea3d5981b01b468f9a..6d5e66f69e1b4ac10ad9d4222de855e6e5f5344e 100644
--- a/Framework/DataHandling/src/LoadBinaryStl.cpp
+++ b/Framework/DataHandling/src/LoadBinaryStl.cpp
@@ -10,11 +10,9 @@ namespace Mantid {
 namespace DataHandling {
 
 bool LoadBinaryStl::isBinarySTL() {
-  // each triangle is 50 bytes
-
   Poco::File stlFile = Poco::File(m_filename);
   auto fileSize = stlFile.getSize();
-  if (fileSize < M_HEADER_SIZE + M_NUM_OF_TRIANGLES) {
+  if (fileSize < HEADER_SIZE + NUM_OF_TRIANGLES) {
     // File is smaller than header plus number of triangles, cannot be binary
     // format stl
     return false;
@@ -24,8 +22,8 @@ bool LoadBinaryStl::isBinarySTL() {
   Kernel::BinaryStreamReader streamReader = Kernel::BinaryStreamReader(myFile);
   numberTrianglesLong = getNumberTriangles(streamReader);
   myFile.close();
-  if (!(fileSize == (M_HEADER_SIZE + M_NUM_OF_TRIANGLES +
-                     (numberTrianglesLong * M_SIZE_OF_TRIANGLE)))) {
+  if (!(fileSize == (HEADER_SIZE + NUM_OF_TRIANGLES +
+                     (numberTrianglesLong * SIZE_OF_TRIANGLE)))) {
     // File is not the Header plus the number of triangles it claims to be long,
     // invalid binary Stl
     return false;
@@ -39,7 +37,7 @@ LoadBinaryStl::getNumberTriangles(Kernel::BinaryStreamReader streamReader) {
   uint32_t numberTrianglesLong;
 
   // skip header
-  streamReader.moveStreamToPosition(M_HEADER_SIZE);
+  streamReader.moveStreamToPosition(HEADER_SIZE);
   // Read the number of triangles
   streamReader >> numberTrianglesLong;
   return numberTrianglesLong;
@@ -51,14 +49,14 @@ std::unique_ptr<Geometry::MeshObject> LoadBinaryStl::readStl() {
 
   Kernel::BinaryStreamReader streamReader = Kernel::BinaryStreamReader(myFile);
   const auto numberTrianglesLong = getNumberTriangles(streamReader);
-  uint32_t nextToRead = M_HEADER_SIZE + M_NUM_OF_TRIANGLES + SIZE_OF_NORMAL;
+  uint32_t nextToRead = HEADER_SIZE + NUM_OF_TRIANGLES + SIZE_OF_NORMAL;
 
   // now read in all the triangles
   for (uint32_t i = 0; i < numberTrianglesLong; i++) {
     // find next triangle, skipping the normal and attribute
     streamReader.moveStreamToPosition(nextToRead);
     readTriangle(streamReader);
-    nextToRead += M_SIZE_OF_TRIANGLE;
+    nextToRead += SIZE_OF_TRIANGLE;
   }
   myFile.close();
   std::unique_ptr<Geometry::MeshObject> retVal =
diff --git a/Framework/DataHandling/test/LoadBinaryStlTest.h b/Framework/DataHandling/test/LoadBinaryStlTest.h
index d00f1045a88b331cc95eef3e08fea26fc32b7812..250e7a3a7de8d24ab743e0d79320ad171c3afebf 100644
--- a/Framework/DataHandling/test/LoadBinaryStlTest.h
+++ b/Framework/DataHandling/test/LoadBinaryStlTest.h
@@ -1,5 +1,5 @@
-#ifndef LOAD_BinaryStl_TEST_H_
-#define LOAD_BinaryStl_TEST_H_
+#ifndef LOAD_BINARYSTL_TEST_H_
+#define LOAD_BINARYSTL_TEST_H_
 
 #include "MantidAPI/AnalysisDataService.h"
 #include "MantidAPI/FileFinder.h"
@@ -84,4 +84,4 @@ public:
   }
 };
 
-#endif /* LOAD_BinaryStl_TEST_H_ */
\ No newline at end of file
+#endif /* LOAD_BINARYSTL_TEST_H_ */
\ No newline at end of file