diff --git a/Cargo.toml b/Cargo.toml
index eb4c7b4db..a7ad66c6d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -508,6 +508,7 @@ features = [
     "charset",
     "json",
     "socks",
+    "system-proxy",
 ]
 
 # RSA cryptography