diff --git a/src/OpenMesh/Tools/Decimater/Observer.hh b/src/OpenMesh/Tools/Decimater/Observer.hh
index 791a5711..d89c2703 100644
--- a/src/OpenMesh/Tools/Decimater/Observer.hh
+++ b/src/OpenMesh/Tools/Decimater/Observer.hh
@@ -78,7 +78,7 @@ public:
 
   /** Create an observer
    *
-   * @param _notificationIntervall Interval of decimation steps between notifications.
+   * @param _notificationInterval Interval of decimation steps between notifications.
    */
   Observer(size_t _notificationInterval);