diff --git a/build_extra/rust/rust.gni b/build_extra/rust/rust.gni
index 8bd1bc0852..cd755d6d31 100644
--- a/build_extra/rust/rust.gni
+++ b/build_extra/rust/rust.gni
@@ -209,7 +209,10 @@ template("rust_crate") {
       args += [ "-g" ]
     }
     if (is_official_build) {
-      args += [ "-O" ]
+      args += [
+        "-C",
+        "opt-level=3",
+      ]
     }
     if (is_test) {
       args += [ "--test" ]