diff --git a/library/std/src/sys/random/trusty.rs b/library/std/src/sys/random/trusty.rs
index da6ca3eea2426..e4db24695f8bd 100644
--- a/library/std/src/sys/random/trusty.rs
+++ b/library/std/src/sys/random/trusty.rs
@@ -1,4 +1,4 @@
-extern "C" {
+unsafe extern "C" {
     fn trusty_rng_secure_rand(randomBuffer: *mut core::ffi::c_void, randomBufferLen: libc::size_t);
 }