diff --git a/ChangeLog b/ChangeLog
index db2fa79f82..e141b698db 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Mar 15 14:51:33 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* file.c (rb_sys_fail_path_with_func): share same function, and path
+	  may be nil.
+
 Fri Mar 15 08:24:51 2013  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* file.c (rb_sys_fail_path): define & use rb_sys_fail_path0 like r39752
diff --git a/dir.c b/dir.c
index 27f16ebc4b..5af16ea39a 100644
--- a/dir.c
+++ b/dir.c
@@ -79,8 +79,6 @@ char *strchr(char*,char);
 #define opendir(p) rb_w32_uopendir(p)
 #endif
 
-#define rb_sys_fail_path(path) rb_sys_fail_str(path)
-
 #define FNM_NOESCAPE	0x01
 #define FNM_PATHNAME	0x02
 #define FNM_DOTMATCH	0x04
diff --git a/file.c b/file.c
index 5cc4b53c6a..6e30c067f3 100644
--- a/file.c
+++ b/file.c
@@ -103,18 +103,19 @@ int flock(int, int);
 #endif
 
 #ifdef RUBY_FUNCTION_NAME_STRING
-# define rb_sys_fail_path(path) rb_sys_fail_path0(RUBY_FUNCTION_NAME_STRING, path)
-NORETURN(static void rb_sys_fail_path0(const char *,VALUE));
-static void
-rb_sys_fail_path0(const char *func_name, VALUE path)
+void
+rb_sys_fail_path_with_func(const char *func_name, VALUE path)
 {
     VALUE mesg = rb_str_new_cstr(func_name);
-    rb_str_buf_cat2(mesg, ": ");
-    rb_str_buf_append(mesg, path);
+    if (!NIL_P(path)) {
+	/* RUBY_FUNCTION_NAME_STRING, aka __func__/__FUNCTION__ is not a
+	 * preprocessor macro but a static constant array, so string
+	 * literal concatenation is not allowed */
+	rb_str_buf_cat2(mesg, ": ");
+	rb_str_buf_append(mesg, path);
+    }
     rb_sys_fail_str(mesg);
 }
-#else
-# define rb_sys_fail_path(path) rb_sys_fail_str(path)
 #endif
 
 #if defined(__BEOS__) || defined(__HAIKU__) /* should not change ID if -1 */
diff --git a/internal.h b/internal.h
index bcc0b3667f..0902ac05c2 100644
--- a/internal.h
+++ b/internal.h
@@ -122,6 +122,13 @@ VALUE rb_get_path_check_to_string(VALUE, int);
 VALUE rb_get_path_check_convert(VALUE, VALUE, int);
 void Init_File(void);
 
+#ifdef RUBY_FUNCTION_NAME_STRING
+NORETURN(void rb_sys_fail_path_with_func(const char *func_name, VALUE path));
+# define rb_sys_fail_path(path) rb_sys_fail_path_with_func(RUBY_FUNCTION_NAME_STRING, path)
+#else
+# define rb_sys_fail_path(path) rb_sys_fail_str(path)
+#endif
+
 #ifdef _WIN32
 /* file.c, win32/file.c */
 void rb_w32_init_file(void);
diff --git a/io.c b/io.c
index 837c1b6ded..f3dd3e3814 100644
--- a/io.c
+++ b/io.c
@@ -399,21 +399,6 @@ rb_cloexec_fcntl_dupfd(int fd, int minfd)
 #  endif
 #endif
 
-#ifdef RUBY_FUNCTION_NAME_STRING
-# define rb_sys_fail_path(path) rb_sys_fail_path0(RUBY_FUNCTION_NAME_STRING, path)
-NORETURN(static void rb_sys_fail_path0(const char *,VALUE));
-static void
-rb_sys_fail_path0(const char *func_name, VALUE path)
-{
-    VALUE mesg = rb_str_new_cstr(func_name);
-    rb_str_buf_cat2(mesg, ": ");
-    rb_str_buf_append(mesg, path);
-    rb_sys_fail_str(mesg);
-}
-#else
-# define rb_sys_fail_path(path) rb_sys_fail_str(path)
-#endif
-
 static int io_fflush(rb_io_t *);
 static rb_io_t *flush_before_seek(rb_io_t *fptr);