diff --git a/libsrc/meshing/meshtype.cpp b/libsrc/meshing/meshtype.cpp
index 73c38901..120efffc 100644
--- a/libsrc/meshing/meshtype.cpp
+++ b/libsrc/meshing/meshtype.cpp
@@ -428,7 +428,7 @@ namespace netgen
       case TRIG: pp = &eltriqp[0][0]; break;
       case QUAD: pp = &elquadqp[ip-1][0]; break;
       default:
-        PrintSysError ("Element2d::GetIntegrationPoint, illegal type ", typ);
+        PrintSysError ("Element2d::GetIntegrationPoint, illegal type ", int(typ));
       }
 
     p.X() = pp[0];
@@ -483,7 +483,7 @@ namespace netgen
       case TRIG: dshapep = &ipdtrig.Get(ip)->dshape; break;
       case QUAD: dshapep = &ipdquad.Get(ip)->dshape; break;
       default:
-        PrintSysError ("Element2d::GetTransformation, illegal type ", typ);
+        PrintSysError ("Element2d::GetTransformation, illegal type ", int(typ));
       }
   
     CalcABt (pmat, *dshapep, trans);
@@ -512,7 +512,7 @@ namespace netgen
         shape(3) = (1-p.X()) * p.Y();
         break;
       default:
-        PrintSysError ("Element2d::GetShape, illegal type ", typ);
+        PrintSysError ("Element2d::GetShape, illegal type ", int(typ));
       }
   }
 
@@ -582,7 +582,7 @@ namespace netgen
         break;
 
       default:
-        PrintSysError ("Element2d::GetDShape, illegal type ", typ);
+        PrintSysError ("Element2d::GetDShape, illegal type ", int(typ));
       }
   }
 
diff --git a/libsrc/meshing/meshtype.hpp b/libsrc/meshing/meshtype.hpp
index 56786569..d0072767 100644
--- a/libsrc/meshing/meshtype.hpp
+++ b/libsrc/meshing/meshtype.hpp
@@ -341,7 +341,7 @@ namespace netgen
 	case QUAD6: np = 6; break;
 	case QUAD8: np = 8; break;
 	default:
-	  PrintSysError ("Element2d::SetType, illegal type ", typ);
+	  PrintSysError ("Element2d::SetType, illegal type ", int(typ));
 	}
     }
     ///
diff --git a/libsrc/meshing/secondorder.cpp b/libsrc/meshing/secondorder.cpp
index 8f419b01..5d3bd2f0 100644
--- a/libsrc/meshing/secondorder.cpp
+++ b/libsrc/meshing/secondorder.cpp
@@ -244,7 +244,7 @@ namespace netgen
 	      break;
 	    }
 	  default:
-	    PrintSysError ("MakeSecondOrder, illegal vol type ", el.GetType());
+	    PrintSysError ("MakeSecondOrder, illegal vol type ", int(el.GetType()));
 	  }