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docs/gwcs/legacy_api.rst

@@ -28,7 +28,7 @@ The ``invert`` method evaluates the backward transform.
 
 GWCS keeps track of units defined in the transforms, the inputs (if quantities) and
 the coordinate frames. The type of the result matches the type of the inputs. If the input
-is Quantities the result is quantites, even if the transforms do not support units.
+is Quantities the result is quantities, even if the transforms do not support units.
 In this case the units defined in the coordinate frames are used.
 The Legacy API does not work with High Level Objects. These are supported only by the
 High Level API.