diff --git a/src/lib/linux_os.rs b/src/lib/linux_os.rs
index 563d10092cb..0ef636ac5fe 100644
--- a/src/lib/linux_os.rs
+++ b/src/lib/linux_os.rs
@@ -72,7 +72,7 @@ fn waitpid(pid: int) -> int {
     ret status;
 }
 
-native "rust" mod rustrt {
+native "c-stack-cdecl" mod rustrt {
     fn rust_getcwd() -> str;
 }
 
diff --git a/src/lib/macos_os.rs b/src/lib/macos_os.rs
index aaf682b23ba..f8f19b77387 100644
--- a/src/lib/macos_os.rs
+++ b/src/lib/macos_os.rs
@@ -71,7 +71,7 @@ fn waitpid(pid: int) -> int {
     ret status;
 }
 
-native "rust" mod rustrt {
+native "c-stack-cdecl" mod rustrt {
     fn rust_getcwd() -> str;
 }
 
diff --git a/src/lib/win32_os.rs b/src/lib/win32_os.rs
index 560d9be8c8e..eaa895f1ef1 100644
--- a/src/lib/win32_os.rs
+++ b/src/lib/win32_os.rs
@@ -79,7 +79,7 @@ fn fd_FILE(fd: int) -> libc::FILE {
     ret str::as_buf("r", {|modebuf| libc::_fdopen(fd, modebuf) });
 }
 
-native "rust" mod rustrt {
+native "c-stack-cdecl" mod rustrt {
     fn rust_process_wait(handle: int) -> int;
     fn rust_getcwd() -> str;
 }