diff --git a/lemon/bits/array_map.h b/lemon/bits/array_map.h
--- a/lemon/bits/array_map.h
+++ b/lemon/bits/array_map.h
@@ -135,7 +135,7 @@
 
     // \brief Template assign operator.
     //
-    // The given parameter should be conform to the ReadMap
+    // The given parameter should conform to the ReadMap
     // concecpt and could be indiced by the current item set of
     // the NodeMap. In this case the value for each item
     // is assigned by the value of the given ReadMap.