diff --git a/build.config.aarch64 b/build.config.aarch64
index 569b9747661d..3b9ccac718a9 100644
--- a/build.config.aarch64
+++ b/build.config.aarch64
@@ -1,5 +1,6 @@
 ARCH=arm64
 
+LLVM_IAS=1
 CROSS_COMPILE=aarch64-linux-gnu-
 CROSS_COMPILE_COMPAT=arm-linux-gnueabi-
 LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN=prebuilts/gas/linux-x86