diff --git a/src/OpenMesh/Core/Mesh/PolyConnectivity_inline_impl.hh b/src/OpenMesh/Core/Mesh/PolyConnectivity_inline_impl.hh
index 3599ff86..dd0f3e60 100644
--- a/src/OpenMesh/Core/Mesh/PolyConnectivity_inline_impl.hh
+++ b/src/OpenMesh/Core/Mesh/PolyConnectivity_inline_impl.hh
@@ -40,7 +40,7 @@
  * ========================================================================= */
 
 #ifndef OPENMESH_POLYCONNECTIVITY_INTERFACE_INCLUDE
-#error Don't include this directly, include instead PolyConnectivity.hh 
+#error Dont include this directly, include instead PolyConnectivity.hh
 #endif // OPENMESH_POLYCONNECTIVITY_INTERFACE_INCLUDE
 
 #include <OpenMesh/Core/Mesh/IteratorsT.hh>
diff --git a/src/OpenMesh/Core/Mesh/SmartHandles.hh b/src/OpenMesh/Core/Mesh/SmartHandles.hh
index ca3b993c..bce3248d 100644
--- a/src/OpenMesh/Core/Mesh/SmartHandles.hh
+++ b/src/OpenMesh/Core/Mesh/SmartHandles.hh
@@ -40,7 +40,7 @@
  * ========================================================================= */
 
 #ifndef OPENMESH_POLYCONNECTIVITY_INTERFACE_INCLUDE
-#error Don't include this directly, include instead PolyConnectivity.hh
+#error Dont include this directly, include instead PolyConnectivity.hh
 #endif//OPENMESH_POLYCONNECTIVITY_INTERFACE_INCLUDE
 
 //== NAMESPACES ===============================================================