diff --git a/ChangeLog b/ChangeLog
index de1c2c29d3..7a1d6d7606 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Feb 14 13:15:35 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* win32/win32.c (is_internal_cmd): if the first char of prog is '@',
+	  execute it via shell.  [ruby-core:35218] (#4393)
+
 Mon Feb 14 10:33:45 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* lib/test/unit.rb: revert r30863, because it causes too many noise.
diff --git a/win32/win32.c b/win32/win32.c
index ef7acce6ca..99802d07d0 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -854,6 +854,8 @@ is_internal_cmd(const char *cmd, int nt)
     do {
 	if (!(c = *cmd++)) return 0;
     } while (isspace(c));
+    if (c == '@')
+	return 1;
     while (isalpha(c)) {
 	*b++ = tolower(c);
 	if (b == cmdname + sizeof(cmdname)) return 0;