diff --git a/src/StdMeshers/StdMeshers_Prism_3D.cxx b/src/StdMeshers/StdMeshers_Prism_3D.cxx
index 17c67d6e1..eae0a3138 100644
--- a/src/StdMeshers/StdMeshers_Prism_3D.cxx
+++ b/src/StdMeshers/StdMeshers_Prism_3D.cxx
@@ -69,8 +69,9 @@ using namespace std;
 // cout << msg << " ("<< p.X() << "; " <<p.Y() << "; " <<p.Z() << ") " <<endl;\
 // }
 
-typedef StdMeshers_ProjectionUtils TAssocTool;
-typedef SMESH_Comment              TCom;
+namespace TAssocTool = StdMeshers_ProjectionUtils;
+
+typedef SMESH_Comment TCom;
 
 enum { ID_BOT_FACE = SMESH_Block::ID_Fxy0,
        ID_TOP_FACE = SMESH_Block::ID_Fxy1,
diff --git a/src/StdMeshers/StdMeshers_RadialPrism_3D.cxx b/src/StdMeshers/StdMeshers_RadialPrism_3D.cxx
index ec34a041c..143f58e7a 100644
--- a/src/StdMeshers/StdMeshers_RadialPrism_3D.cxx
+++ b/src/StdMeshers/StdMeshers_RadialPrism_3D.cxx
@@ -67,7 +67,7 @@ using namespace std;
 #define RETURN_BAD_RESULT(msg) { MESSAGE(")-: Error: " << msg); return false; }
 #define gpXYZ(n) gp_XYZ(n->X(),n->Y(),n->Z())
 
-typedef StdMeshers_ProjectionUtils TAssocTool;
+namespace TAssocTool = StdMeshers_ProjectionUtils;
 
 //=======================================================================
 //function : StdMeshers_RadialPrism_3D