diff --git a/ChangeLog b/ChangeLog
index 4d13911641..7a1a9f6428 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Aug  9 16:36:51 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* common.mk (ruby.imp): excluded prelude.o to get rid of circular
+	  dependency.  [ruby-dev:39052]
+
 Sun Aug  9 14:49:24 2009  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* bignum.c (rb_big_cmp, bigsub, big_real_len, bigmul1_normal,
@@ -8,6 +13,7 @@ Sat Aug  8 17:03:21 2009  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* encoding.c (enc_ascii_compatible_p): added. [ruby-core:24793]
 	  (Init_Encoding): New API Encoding#ascii_compatible?.
+
 Sun Aug  9 07:25:07 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/ripper/eventids2.c (token_to_eventid): added
diff --git a/common.mk b/common.mk
index de69872337..1f9b1ca9f1 100644
--- a/common.mk
+++ b/common.mk
@@ -86,11 +86,12 @@ COMMONOBJS    = array.$(OBJEXT) \
 		$(BUILTIN_TRANSOBJS) \
 		$(MISSING)
 
-OBJS          = dln.$(OBJEXT) \
+EXPORTOBJS    = dln.$(OBJEXT) \
 		encoding.$(OBJEXT) \
-		prelude.$(OBJEXT) \
 		$(COMMONOBJS)
 
+OBJS          = $(EXPORTOBJS) prelude.$(OBJEXT)
+
 GOLFOBJS      = goruby.$(OBJEXT) golf_prelude.$(OBJEXT)
 
 PRELUDE_SCRIPTS = $(srcdir)/prelude.rb $(srcdir)/enc/prelude.rb $(srcdir)/gem_prelude.rb
@@ -168,8 +169,8 @@ $(STATIC_RUBY)$(EXEEXT): $(MAINOBJ) $(DLDOBJS) $(EXTOBJS) $(LIBRUBY_A)
 	@$(RM) $@
 	$(PURIFY) $(CC) $(MAINOBJ) $(DLDOBJS) $(EXTOBJS) $(LIBRUBY_A) $(MAINLIBS) $(EXTLIBS) $(LIBS) $(OUTFLAG)$@ $(LDFLAGS) $(XLDFLAGS)
 
-ruby.imp: $(OBJS)
-	@$(NM) -Pgp $(OBJS) | awk 'BEGIN{print "#!"}; $$2~/^[BD]$$/{print $$1}' | sort -u -o $@
+ruby.imp: $(EXPORTOBJS)
+	@$(NM) -Pgp $(EXPORTOBJS) | awk 'BEGIN{print "#!"}; $$2~/^[BD]$$/{print $$1}' | sort -u -o $@
 
 install: install-nodoc $(RDOCTARGET)
 install-all: install-nodoc install-doc install-capi