Add CI badges
diff --git a/Cargo.toml b/Cargo.toml
index ba82258..da8bbdc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,10 @@
 other common platform libraries.
 """
 
+[badges]
+travis-ci = { repository = "rust-lang/libc" }
+appveyor = { repository = "rust-lang-libs/libc" }
+
 [features]
 default = ["use_std"]
 use_std = []