diff --git a/ChangeLog b/ChangeLog
index e0ee39eb01..850778091c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jul 18 15:11:11 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* include/ruby/ruby.h (ruby_safe_level_4): get rid of special
+	  character.  [ruby-dev:47512] [misc #8646]
+
 Thu Jul 18 14:51:39 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* array.c (ary_alloc): slim setup process.
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 91efa39db9..7812ee202a 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -567,12 +567,12 @@ void rb_secure(int);
 int rb_safe_level(void);
 void rb_set_safe_level(int);
 #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
-int ruby$safe_level$4(void) __attribute__((error("$SAFE=4 is obsolete")));
+int ruby_safe_level_4(void) __attribute__((error("$SAFE=4 is obsolete")));
 #define RUBY_SAFE_LEVEL_INVALID_P(level) \
     __extension__(__builtin_constant_p(level) && \
 		  ((level) < 0 || RUBY_SAFE_LEVEL_MAX < (level)))
 #define RUBY_SAFE_LEVEL_CHECK(level) \
-    (RUBY_SAFE_LEVEL_INVALID_P(level) ? ruby$safe_level$4() : (level))
+    (RUBY_SAFE_LEVEL_INVALID_P(level) ? ruby_safe_level_4() : (level))
 #define rb_secure(level) rb_secure(RUBY_SAFE_LEVEL_CHECK(level))
 #define rb_set_safe_level(level) rb_set_safe_level(RUBY_SAFE_LEVEL_CHECK(level))
 #endif