diff --git a/openssl-sys/Cargo.toml b/openssl-sys/Cargo.toml
index 44259068b710a93b34396f9358c1f0ce59f408ba..894b85356ee193b47d2149dbe044cc05573d6105 100644
--- a/openssl-sys/Cargo.toml
+++ b/openssl-sys/Cargo.toml
@@ -21,7 +21,7 @@ libc = "0.2"
 cc = "1.0"
 openssl-src = { version = "111.0.1", optional = true }
 pkg-config = "0.3.9"
-rustc_version = "0.2"
+autocfg = "0.1.2"
 
 [target.'cfg(target_env = "msvc")'.build-dependencies]
 vcpkg = "0.2"
diff --git a/openssl-sys/build/main.rs b/openssl-sys/build/main.rs
index f788b7392daa9e8ca7046739bc648809853a3c07..04e2da3bfe3aca10c44853fcc113ff5a72852315 100644
--- a/openssl-sys/build/main.rs
+++ b/openssl-sys/build/main.rs
@@ -2,7 +2,7 @@ extern crate cc;
 #[cfg(feature = "vendored")]
 extern crate openssl_src;
 extern crate pkg_config;
-extern crate rustc_version;
+extern crate autocfg;
 #[cfg(target_env = "msvc")]
 extern crate vcpkg;
 
@@ -94,9 +94,9 @@ fn main() {
 }
 
 fn check_rustc_versions() {
-    let version = rustc_version::version().unwrap();
+    let cfg = autocfg::new();
 
-    if version >= rustc_version::Version::new(1, 31, 0) {
+    if cfg.probe_rustc_version(1, 31) {
         println!("cargo:rustc-cfg=const_fn");
     }
 }