diff --git a/ChangeLog b/ChangeLog
index d7c2ecd770..92d6546ed4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Oct 30 00:35:13 2010  Koichi Sasada  <ko1@atdot.net>
+
+	* iseq.c (iseq_s_compile): fix optional argument.
+	  a patch from Yutaka HARA [ruby-core:32953] [Ruby 1.9-Bug#4001]
+
 Mon Nov 22 21:30:57 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* string.c (rb_str_inspect): fix for ascii-compatible external
diff --git a/iseq.c b/iseq.c
index 51891b2ce1..372a773742 100644
--- a/iseq.c
+++ b/iseq.c
@@ -579,7 +579,7 @@ iseq_s_compile(int argc, VALUE *argv, VALUE self)
 
     rb_secure(1);
 
-    rb_scan_args(argc, argv, "13", &src, &file, &path, &line, &opt);
+    rb_scan_args(argc, argv, "14", &src, &file, &path, &line, &opt);
     if (NIL_P(file)) file = rb_str_new2("<compiled>");
     if (NIL_P(line)) line = INT2FIX(1);
 
diff --git a/version.h b/version.h
index a30cacf2e8..ad29dbd6dd 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_PATCHLEVEL 104
+#define RUBY_PATCHLEVEL 105
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1