diff --git a/Makefile.in b/Makefile.in
index f82e1176d6c..a30d6c571b0 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -467,7 +467,6 @@ include $(CFG_SRC_DIR)mk/host.mk
 include $(CFG_SRC_DIR)mk/stage0.mk
 include $(CFG_SRC_DIR)mk/rt.mk
 include $(CFG_SRC_DIR)mk/rustllvm.mk
-include $(CFG_SRC_DIR)mk/autodep.mk
 include $(CFG_SRC_DIR)mk/tools.mk
 include $(CFG_SRC_DIR)mk/docs.mk
 include $(CFG_SRC_DIR)mk/llvm.mk
diff --git a/mk/autodep.mk b/mk/autodep.mk
deleted file mode 100644
index a53d0aa9bdf..00000000000
--- a/mk/autodep.mk
+++ /dev/null
@@ -1,30 +0,0 @@
-######################################################################
-# Auto-dependency
-######################################################################
-
-C_DEPFILES := $(RUNTIME_CS:%.cpp=%.d) $(RUSTLLVM_LIB_CS:%.cpp=%.d) \
-              $(RUSTLLVM_OBJS_CS:%.cpp=%.d)
-
-rt/%.d: rt/%.cpp $(MKFILE_DEPS)
-	@$(call E, dep: $@)
-	$(Q)$(call CFG_DEPEND_C, $@ \
-      $(subst $(S)src/,,$(patsubst %.cpp, %.o, $<)), \
-      $(RUNTIME_INCS)) $< >$@.tmp
-	$(Q)$(CFG_PATH_MUNGE) $@.tmp
-	$(Q)rm -f $@.tmp.bak
-	$(Q)mv $@.tmp $@
-
-rustllvm/%.d: rustllvm/%.cpp $(MKFILE_DEPS) $(LLVM_CONFIG_$(CFG_HOST_TRIPLE))
-	@$(call E, dep: $@)
-	$(Q)$(call CFG_DEPEND_C, $@ \
-      $(subst $(S)src/,,$(patsubst %.cpp, %.o, $<)), \
-      $(LLVM_CXXFLAGS_$(CFG_HOST_TRIPLE)) $(RUSTLLVM_INCS)) $< >$@.tmp
-	$(Q)$(CFG_PATH_MUNGE) $@.tmp
-	$(Q)rm -f $@.tmp.bak
-	$(Q)mv $@.tmp $@
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(C_DEPFILES)
-endif
-
-depend: $(C_DEPFILES)