diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 7b579a003e30..d1a961539101 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -74,6 +74,7 @@ ifeq ($(CONFIG_PERF_EVENTS),y)
 endif
 
 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
+KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
 
 # GCC versions that support the "-mstrict-align" option default to allowing
 # unaligned accesses.  While unaligned accesses are explicitly allowed in the