diff --git a/collects/scribblings/reference/filesystem.scrbl b/collects/scribblings/reference/filesystem.scrbl
index 81cf228d7b..b8dabe6846 100644
--- a/collects/scribblings/reference/filesystem.scrbl
+++ b/collects/scribblings/reference/filesystem.scrbl
@@ -391,7 +391,7 @@ a distribution.
 In addition to the bindings described below,
 @schememodname[scheme/runtime-path] provides @scheme[#%datum] in
 @tech{phase level} 1, since string constants are often used as
-compile-time expression with @scheme[define-runtime-path].
+compile-time expressions with @scheme[define-runtime-path].
 
 @defform[(define-runtime-path id expr)]{