diff --git a/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp b/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
index 249591f64..61313a796 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
@@ -746,9 +746,11 @@ void ViewProviderFEMMeshBuilder::createMesh(const App::Property* prop,
 
     int numTries;
     if(ShowFaces)
-        numTries = numTria+numQuad/*+numPoly*/+numTetr*4+numHexa*6+numPyrd*5+numPris*6;
+        numTries = numTria+numQuad/*+numPoly*/+numTetr*4+numHexa*6+numPyrd*5+numPris*5;
     else
-        numTries = numTetr*4+numHexa*6+numPyrd*5+numPris*6;
+        numTries = numTetr*4+numHexa*6+numPyrd*5+numPris*5;
+    // It is not 100% sure that a prism in smesh is a pentahedron in any case, but it will be in most cases!
+    // See http://forum.freecadweb.org/viewtopic.php?f=18&t=13583#p109707
 
     // corner case only edges (Beams) in the mesh. This need some special cases in building up visual
     onlyEdges = false;