diff --git a/ChangeLog b/ChangeLog
index 8fa6d3a68a..577030e931 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Thu Nov 22 18:01:28 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* Makefile.in (probes.o): add -C to ignore #include in probes.d.
+
+	* probes.d: include vm_opts.h instead of vm_core.h.
+
+	* vm_opts.h (VM_COLLECT_USAGE_DETAILS): move definition from vm_core.h.
+
 Thu Nov 22 17:45:17 2012  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* ext/nkf/nkf-utf8: Merge b0a6577a521d1bba5e19853f95d5c4b9be1072b5.
diff --git a/Makefile.in b/Makefile.in
index aae4d061ba..42cc95132e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -350,7 +350,7 @@ probes.@OBJEXT@: $(srcdir)/probes.d
 	fi; \
 	touch "$$stamp"
 	$(RM) $@
-	$(Q) $(DTRACE) -G -s $(srcdir)/probes.d -o $@ $(DTRACE_DEPENDENT_OBJS)
+	$(Q) $(DTRACE) -G -C $(INCFLAGS) -s $(srcdir)/probes.d -o $@ $(DTRACE_DEPENDENT_OBJS)
 
 # DTrace static library hacks described here:
 # http://mail.opensolaris.org/pipermail/dtrace-discuss/2005-August/000207.html
diff --git a/probes.d b/probes.d
index 16122ab330..d2b475a51c 100644
--- a/probes.d
+++ b/probes.d
@@ -1,4 +1,4 @@
-#include "vm_core.h"
+#include "vm_opts.h"
 
 provider ruby {
   probe function__entry(const char *, const char *, const char *, int);
diff --git a/vm_core.h b/vm_core.h
index 2e85eec524..fffaa5e986 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -14,10 +14,6 @@
 
 #define RUBY_VM_THREAD_MODEL 2
 
-#ifndef VM_COLLECT_USAGE_DETAILS
-#define VM_COLLECT_USAGE_DETAILS 0
-#endif
-
 #include "ruby/ruby.h"
 #include "ruby/st.h"
 
diff --git a/vm_opts.h b/vm_opts.h
index 4f7162d1b4..f77b01886e 100644
--- a/vm_opts.h
+++ b/vm_opts.h
@@ -49,4 +49,8 @@
 /* misc */
 #define SUPPORT_JOKE                 0
 
+#ifndef VM_COLLECT_USAGE_DETAILS
+#define VM_COLLECT_USAGE_DETAILS 0
+#endif
+
 #endif /* RUBY_VM_OPTS_H */