diff --git a/ChangeLog b/ChangeLog
index 48ba0bb629..db7bab7b5d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Sep 27 11:58:23 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (optflags): add -fomit-frame-pointer by default.
+
 Sun Sep 27 11:28:15 2009  Tanaka Akira  <akr@fsij.org>
 
 	* enum.c (enum_minmax): use struct for memo.
diff --git a/configure.in b/configure.in
index 1fad64cfb4..015ed5da00 100644
--- a/configure.in
+++ b/configure.in
@@ -257,7 +257,7 @@ AC_PROG_GCC_TRADITIONAL
 AC_SUBST(GCC)
 if test "$GCC" = yes; then
     linker_flag=-Wl,
-    : ${optflags=-O3}
+    : ${optflags='-O3 -fomit-frame-pointer'}
     case "$target_os" in
       when(linux*|darwin*)
 	: ${debugflags=-ggdb};;