--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,7 +70,6 @@
 ssh = ["libgit2-sys/ssh"]
 ssh_key_from_memory = ["libgit2-sys/ssh_key_from_memory"]
 unstable = []
-zlib-ng-compat = ["libgit2-sys/zlib-ng-compat"]
 
 [target."cfg(all(unix, not(target_os = \"macos\")))".dependencies.openssl-probe]
 version = "0.1"