diff --git a/collects/scribblings/reference/custom-ports.scrbl b/collects/scribblings/reference/custom-ports.scrbl
index 6f5bde0888..606dbc74b6 100644
--- a/collects/scribblings/reference/custom-ports.scrbl
+++ b/collects/scribblings/reference/custom-ports.scrbl
@@ -892,7 +892,7 @@ procedures.
     result is the number of bytes written.
 
     If @scheme[get-write-evt] is @scheme[#f], then
-    @scheme[port-writes-atomic?] will produce @scheme[#f] with applied
+    @scheme[port-writes-atomic?] will produce @scheme[#f] when applied
     to the port, and the port will not be a valid argument to
     procedures such as @scheme[write-bytes-avail-evt].