diff --git a/src/validators/uri.py b/src/validators/uri.py
index 14bab40..6699159 100644
--- a/src/validators/uri.py
+++ b/src/validators/uri.py
@@ -68,7 +68,7 @@ def uri(value: str, /):
 
     # email
     if value.startswith("mailto:"):
-        return email(value.lstrip("mailto:"))
+        return email(value[len("mailto:"):])
 
     # file
     if value.startswith("file:"):