diff --git a/tools/lkl/Makefile.autoconf b/tools/lkl/Makefile.autoconf
index a15753193a4f6e..fc47f12a3093c1 100644
--- a/tools/lkl/Makefile.autoconf
+++ b/tools/lkl/Makefile.autoconf
@@ -166,7 +166,7 @@ endef
 define do_autoconf_llvm
   $(eval LLVM_PREFIX := $(if $(filter %/,$(LLVM)),$(LLVM)))
   $(eval LLVM_SUFFIX := $(if $(filter -%,$(LLVM)),$(LLVM)))
-  export CROSS_COMPILE := $(CROSS_COMPILE)
+  export CLANG_TARGET_FLAGS_lkl := $(CROSS_COMPILE)
   export CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
   export LD := $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
   export AR := $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)