diff --git a/Cargo.toml b/Cargo.toml
index 100740f..35b68ba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,6 @@ libc = { version = "0.2.138", default-features = false, optional = true }
 # Special dependencies used in rustc-dep-of-std mode.
 core = { version = "1.0.0", optional = true, package = "rustc-std-workspace-core" }
 alloc = { version = "1.0.0", optional = true, package = "rustc-std-workspace-alloc" }
-compiler_builtins = { version = '0.1.49', optional = true }
 
 [target.'cfg(not(target_arch = "arm"))'.dependencies.unwinding]
 version = "0.2.0"
@@ -52,7 +51,6 @@ set_thread_id = []
 rustc-dep-of-std = [
     "core",
     "alloc",
-    "compiler_builtins",
     "linux-raw-sys/rustc-dep-of-std",
     "bitflags/rustc-dep-of-std",
     "libc/rustc-dep-of-std",