diff --git a/src/url.lua b/src/url.lua
index 3290ce7..fb333b1 100644
--- a/src/url.lua
+++ b/src/url.lua
@@ -49,7 +49,7 @@ local function make_set(t)
     return s
 end
 
--- these are allowed withing a path segment, along with alphanum
+-- these are allowed within a path segment, along with alphanum
 -- other characters must be escaped
 local segment_set = make_set {
     "-", "_", ".", "!", "~", "*", "'", "(",