diff --git a/ChangeLog b/ChangeLog
index 5ada4e4ebd..50e3627c06 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Mon Feb  2 22:38:53 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (rb_cv_binary_elf): get rid of -e option of cat
+	  which is not available on BusyBox, use tr instead.
+	  [ruby-core:64824] [Bug #10210]
+
 Thu Jan 22 20:40:36 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/openssl/ossl_cipher.c (ossl_cipher_update_long): update huge
diff --git a/configure.in b/configure.in
index 6f8d9072e7..cc8849eb45 100644
--- a/configure.in
+++ b/configure.in
@@ -2620,8 +2620,8 @@ AC_ARG_WITH(dln-a-out,
 
 AC_CACHE_CHECK(whether ELF binaries are produced, rb_cv_binary_elf,
 [AC_TRY_LINK([],[], [
-AS_CASE(["`head -1 conftest$EXEEXT | cat -e`"],
-['^?ELF'*], [rb_cv_binary_elf=yes], [rb_cv_binary_elf=no])],
+AS_CASE(["`head -1 conftest$EXEEXT | tr -dc '\177ELF' | tr '\177' .`"],
+[.ELF*], [rb_cv_binary_elf=yes], [rb_cv_binary_elf=no])],
 rb_cv_binary_elf=no)])
 
 if test "$rb_cv_binary_elf" = yes; then
diff --git a/version.h b/version.h
index 184a96175d..9150cbf0aa 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.1.5"
 #define RUBY_RELEASE_DATE "2015-02-02"
-#define RUBY_PATCHLEVEL 286
+#define RUBY_PATCHLEVEL 287
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 2