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path: root/library/std/src/sys/pal/zkvm/abi.rs
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-rw-r--r--library/std/src/sys/pal/zkvm/abi.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/library/std/src/sys/pal/zkvm/abi.rs b/library/std/src/sys/pal/zkvm/abi.rs
index 53332d90e02..d000574f684 100644
--- a/library/std/src/sys/pal/zkvm/abi.rs
+++ b/library/std/src/sys/pal/zkvm/abi.rs
@@ -18,7 +18,7 @@ pub mod fileno {
     pub const JOURNAL: u32 = 3;
 }
 
-extern "C" {
+unsafe extern "C" {
     // Wrappers around syscalls provided by risc0-zkvm-platform:
     pub fn sys_halt();
     pub fn sys_output(output_id: u32, output_value: u32);