diff --git a/chrome/installer/linux/BUILD.gn b/chrome/installer/linux/BUILD.gn
index 0a7f45e..fbc20f5 100644
--- a/chrome/installer/linux/BUILD.gn
+++ b/chrome/installer/linux/BUILD.gn
@@ -41,6 +41,12 @@
 ]
 packaging_files_shlibs = []
 
+# TODO(https://crbug.com/1299021): Implement building these NaCl targets as
+# ARM32 when Chrome is built for ARM64 (for Linux/Chrome OS).
+if (target_cpu == "arm64") {
+  enable_nacl = false
+}
+
 if (enable_nacl) {
   packaging_files_executables += [
     "$root_out_dir/nacl_helper",