diff --git a/Makefile b/Makefile
index 1c658da303..24bff8a48c 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ TARGET_SPEC=$(RUST_TARGET_PATH)/$(ARCH)-unknown-kernel.json
 KERNEL_CARGO_FEATURES?=
 
 $(BUILD)/kernel.all: $(LD_SCRIPT) $(LOCKFILE) $(MANIFEST) $(TARGET_SPEC) $(shell find $(SOURCE) -name "*.rs" -type f)
-	cargo rustc \
+	cargo -Zunstable-options rustc \
 		--bin kernel \
 		--manifest-path "$(MANIFEST)" \
 		--target "$(TARGET_SPEC)" \