diff --git a/common.mk b/common.mk
index e863f41a45ce6c..efb586b2ab035a 100644
--- a/common.mk
+++ b/common.mk
@@ -28,6 +28,7 @@ EXTCONF       = extconf.rb
 LIBRUBY_EXTS  = ./.libruby-with-ext.time
 REVISION_H    = ./.revision.time
 PLATFORM_D    = ./$(PLATFORM_DIR)/.time
+ENC_TRANS_D   = enc/trans/.time
 RDOCOUT       = $(EXTOUT)/rdoc
 HTMLOUT       = $(EXTOUT)/html
 CAPIOUT       = doc/capi
@@ -515,6 +516,12 @@ clean-ext distclean-ext realclean-ext::
 
 clean-enc distclean-enc realclean-enc: PHONY
 
+clean-enc: clean-enc.d
+
+clean-enc.d: PHONY
+	$(Q)$(RM) $(ENC_TRANS_D)
+	-$(Q) $(RMDIR) enc/trans enc 2> $(NULL) || exit 0
+
 clean-rdoc distclean-rdoc realclean-rdoc:
 	@echo $(@:-rdoc=ing) rdoc
 	$(Q)$(RMALL) $(RDOCOUT)
@@ -641,6 +648,12 @@ $(PLATFORM_D):
 	$(Q) $(MAKEDIRS) $(PLATFORM_DIR)
 	@exit > $@
 
+PHONY $(BUILTIN_ENCOBJS) $(BUILTIN_TRANSOBJS): $(ENC_TRANS_D)
+
+$(ENC_TRANS_D):
+	$(Q) $(MAKEDIRS) enc/trans
+	@exit > $@
+
 ###
 CCAN_DIR = {$(VPATH)}ccan
 
diff --git a/enc/depend b/enc/depend
index 76c4f89b0d4040..39a26a7b76d997 100644
--- a/enc/depend
+++ b/enc/depend
@@ -132,7 +132,7 @@ enc/encdb.$(OBJEXT): encdb.h
 enc/trans/transdb.$(OBJEXT): transdb.h
 
 clean:
-% %w[$(ENCSOS) $(LIBENC) $(ENCOBJS) $(ENCCLEANOBJS) $(ENCCLEANLIBS) $(TRANSSOS) $(LIBTRANS) $(TRANSOBJS) $(TRANSCLEANOBJS) $(TRANSCLEANLIBS)].each do |clean|
+% %w[$(ENCSOS) $(LIBENC) $(ENCOBJS) $(ENCCLEANOBJS) $(ENCCLEANLIBS) $(TRANSSOS) $(LIBTRANS) $(TRANSOBJS) $(TRANSCLEANOBJS) $(TRANSCLEANLIBS) enc/trans/.time].each do |clean|
 	$(Q)$(RM) <%=pathrep[clean]%>
 % end
 % @ignore_error = $nmake ? '' : ' 2> /dev/null || true'