diff --git a/collects/scribblings/inside/ports.scrbl b/collects/scribblings/inside/ports.scrbl
index 840ca1a71b..4d6f16a1b7 100644
--- a/collects/scribblings/inside/ports.scrbl
+++ b/collects/scribblings/inside/ports.scrbl
@@ -339,7 +339,6 @@ available, zero otherwise. Under Windows, a ``file dscriptor'' is a
 file @cpp{HANDLE}.}
 
 @function[(long scheme_get_port_fd
-           [Scheme_Object* port]
            [Scheme_Object* port]
            [long* s])]{