diff --git a/python/servo/bootstrap_commands.py b/python/servo/bootstrap_commands.py
index 27ac96ff97d6..a4cf509f1139 100644
--- a/python/servo/bootstrap_commands.py
+++ b/python/servo/bootstrap_commands.py
@@ -211,7 +211,7 @@ def bootstrap_rustc(self, force=False, target=[], stable=False):
                                       "rust-std%s%s-%s" % (nightly_suffix, stable_version, target_triple),
                                       "rust-std-%s" % target_triple, "lib", "rustlib", target_triple),
                             path.join(install_dir,
-                                      "rustc%s%s-%s" % (nightly_suffix, stable_version, host_triple),
+                                      "rustc%s%s-%s" % (nightly_suffix, stable_version, host_triple()),
                                       "rustc", "lib", "rustlib", target_triple))
             shutil.rmtree(path.join(install_dir,
                           "rust-std%s%s-%s" % (nightly_suffix, stable_version, target_triple)))