diff --git a/Cargo.toml b/Cargo.toml
index afbe066..d5530d9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,12 +23,17 @@ exclude = [
 ]
 build = "build.rs"
 
+[dependencies]
+core = { version = '1.0.0', optional = true, package = 'rustc-std-workspace-core' }
+compiler_builtins = { version = '0.1.2', optional = true }
+
 [badges]
 travis-ci = { repository = "bitflags/bitflags" }
 
 [features]
 default = []
 example_generated = []
+rustc-dep-of-std = ["core", "compiler_builtins"]
 
 [package.metadata.docs.rs]
 features = [ "example_generated" ]