1 files changed, 1 insertions, 1 deletions
diff --git a/common.mk b/common.mk
index 1971641b61..010044b621 100644
--- a/common.mk
+++ b/common.mk
@@ -344,7 +344,7 @@ encs: enc.mk
 	$(MAKE) -f enc.mk -$(MAKEFLAGS)
 
 enc.mk: $(srcdir)/enc/make_encmake.rb $(srcdir)/enc/Makefile.in $(srcdir)/enc/depend \
-	$(srcdir)/lib/mkmf.rb rbconfig.rb
+	$(srcdir)/lib/mkmf.rb $(RBCONFIG)
 	$(MINIRUBY) $(srcdir)/enc/make_encmake.rb --builtin-encs="$(BUILTIN_ENCOBJS)" $@
 
 .PRECIOUS: $(MKFILES)