diff --git a/BUILD.gn b/BUILD.gn
index d6caff9..27cad4b 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -55,6 +55,9 @@
       "-fno-integrated-as",
       "-B${rebased_android_toolchain_root}/bin",
     ]
+    if (current_cpu == "arm64") {
+      asmflags += ["-Wa,-march=armv8-a+crypto"]
+    }
   }
 
   if (is_msan) {