diff --git a/src/expand_string.rs b/src/expand_string.rs
index 9b336c9..b6df5b0 100644
--- a/src/expand_string.rs
+++ b/src/expand_string.rs
@@ -1,4 +1,4 @@
-/// Expands url with groups.
+/// Expands string with groups.
 ///
 /// Example:
 /// "(a.|)foo.(bar|baz.(qux|wux)|sar)(.b|.c)"