diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index b9a4a934ca05..7dedf2d8494e 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -37,10 +37,12 @@ $(warning LSE atomics not supported by binutils)
   endif
 endif
 
+ifeq ($(CONFIG_ARM64), y)
 brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)
 
-ifneq ($(brokengasinst),)
+  ifneq ($(brokengasinst),)
 $(warning Detected assembler with broken .inst; disassembly will be unreliable)
+  endif
 endif
 
 KBUILD_CFLAGS	+= -mgeneral-regs-only $(lseinstr) $(brokengasinst)