diff --git a/src/OpenMesh/Tools/Decimater/ModNormalDeviationT.hh b/src/OpenMesh/Tools/Decimater/ModNormalDeviationT.hh
index b2990855..da1975b2 100644
--- a/src/OpenMesh/Tools/Decimater/ModNormalDeviationT.hh
+++ b/src/OpenMesh/Tools/Decimater/ModNormalDeviationT.hh
@@ -121,7 +121,7 @@ public:
 
     if (!mesh_has_normals)
     {
-      std::cerr << "Mesh has no face normals. Compute them automatically." << std::endl;
+      omerr() << "Mesh has no face normals. Compute them automatically." << std::endl;
       _mesh.update_face_normals();
     }
   }
diff --git a/src/OpenMesh/Tools/Decimater/ModNormalFlippingT.hh b/src/OpenMesh/Tools/Decimater/ModNormalFlippingT.hh
index d74ccf7b..2fd3a180 100644
--- a/src/OpenMesh/Tools/Decimater/ModNormalFlippingT.hh
+++ b/src/OpenMesh/Tools/Decimater/ModNormalFlippingT.hh
@@ -99,7 +99,7 @@ public:
 
     if (!mesh_has_normals)
     {
-      std::cerr << "Mesh has no face normals. Compute them automatically." << std::endl;
+      omerr() << "Mesh has no face normals. Compute them automatically." << std::endl;
       _mesh.update_face_normals();
     }
   }