--- a/inst/oc_polybool.m
+++ b/inst/oc_polybool.m
@@ -47,11 +47,11 @@
 ## be repeated at the end (but is permitted). Pairs of (NaN,NaN) coordinates in
 ## @var{sub} and/or @var{clip} are ommitted.
 ##
-## @var{X} is a column vector containing the X coordinates of the vertices for.
-## resultant polygon(s).
-##
-## @var{Y} is a column vector containing the Y coordinates of the vertices for.
-## resultant polygon(s).
+## @var{X} is a column vector containing the X coordinates of the vertices of
+## the resultant polygon(s).
+##
+## @var{Y} is a column vector containing the Y coordinates of the vertices of
+## the resultant polygon(s).
 ##
 ## @var{nPol} is the number of output polygons.
 ##