diff --git a/serde/build.rs b/serde/build.rs
index c9fdaf54..2d985b1c 100644
--- a/serde/build.rs
+++ b/serde/build.rs
@@ -69,7 +69,12 @@ fn main() {
         println!("cargo:rustc-cfg=num_nonzero");
     }
 
+    // TryFrom and Atomic types stabilized in Rust 1.34:
+    // https://blog.rust-lang.org/2019/04/11/Rust-1.34.0.html#tryfrom-and-tryinto
+    // https://blog.rust-lang.org/2019/04/11/Rust-1.34.0.html#library-stabilizations
     if minor >= 34 {
+        println!("cargo:rustc-cfg=core_try_from");
+
         // Whitelist of archs that support std::sync::atomic module. Ideally we
         // would use #[cfg(target_has_atomic = "...")] but it is not stable yet.
         // Instead this is based on rustc's src/librustc_target/spec/*.rs.
diff --git a/serde/src/export.rs b/serde/src/export.rs
index 78c21e49..caa1f4dc 100644
--- a/serde/src/export.rs
+++ b/serde/src/export.rs
@@ -1,5 +1,5 @@
 pub use lib::clone::Clone;
-pub use lib::convert::{From, Into, TryFrom};
+pub use lib::convert::{From, Into};
 pub use lib::default::Default;
 pub use lib::fmt::{self, Formatter};
 pub use lib::marker::PhantomData;
@@ -11,6 +11,9 @@ pub use self::string::from_utf8_lossy;
 #[cfg(any(feature = "alloc", feature = "std"))]
 pub use lib::{ToString, Vec};
 
+#[cfg(core_try_from)]
+pub use lib::convert::TryFrom;
+
 mod string {
     use lib::*;