diff --git a/doc/index.html b/doc/index.html
index 5da9b9c..809ee2a 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -189,7 +189,7 @@ The two objects can rotate around this axis independently.
 One of <tt>obj1</tt> or <tt>obj2</tt> can be the number 0 to signify
 that the other object should be connected to the static environment.
 <tt>anchor</tt> and <tt>axis</tt> should be Lua "arrays" (tables with
-integer indices starting at 1), with three elemenets each.
+integer indices starting at 1), with three elements each.
 <tt>anchor</tt> gives the coordinates of a point on the hinge.
 <tt>axis</tt> gives the direction vector of the hinge.
 </p>