diff --git a/ChangeLog b/ChangeLog
index 307bcba411..f61ea885e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov 13 17:40:04 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* common.mk (vm_insnhelper.c): this target is useless and causes
+	  ruby always need rebuild.
+
 Tue Nov 13 17:35:49 2012  Koichi Sasada  <ko1@atdot.net>
 
 	* compile.c (insn_data_to_s_detail): remove debug lines.
diff --git a/common.mk b/common.mk
index 31f507763a..e813203172 100644
--- a/common.mk
+++ b/common.mk
@@ -762,7 +762,6 @@ compile.$(OBJEXT): {$(VPATH)}compile.c {$(VPATH)}iseq.h \
 iseq.$(OBJEXT): {$(VPATH)}iseq.c {$(VPATH)}gc.h {$(VPATH)}iseq.h \
   $(RUBY_H_INCLUDES) $(VM_CORE_H_INCLUDES) {$(VPATH)}insns.inc \
   {$(VPATH)}insns_info.inc {$(VPATH)}node_name.inc {$(VPATH)}debug.h {$(VPATH)}internal.h
-{$(VPATH)}vm_insnhelper.c:$(PROBES_H_INCLUDES)
 vm.$(OBJEXT): {$(VPATH)}vm.c {$(VPATH)}gc.h {$(VPATH)}iseq.h \
   {$(VPATH)}eval_intern.h $(RUBY_H_INCLUDES) $(ENCODING_H_INCLUDES) \
   $(VM_CORE_H_INCLUDES) {$(VPATH)}vm_method.c {$(VPATH)}vm_eval.c \