diff --git a/ChangeLog b/ChangeLog
index fa3af8173a..6054e15733 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jan 21 08:45:03 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* iseq.c (iseq_s_disasm): check for proc first.  based on the
+	  patch by Roger Pack in [ruby-core:27626].  [ruby-core:27227]
+
 Wed Jan 20 16:09:59 2010  URABE Shyouhei  <shyouhei@ruby-lang.org>
 
 	* common.mk (compile.$(OBJEXT)): dependencies lacking.
diff --git a/iseq.c b/iseq.c
index 7a59fce049..3c957c7692 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1012,10 +1012,7 @@ iseq_s_disasm(VALUE klass, VALUE body)
 
     rb_secure(1);
 
-    if ((iseq = rb_method_get_iseq(body)) != 0) {
-	ret = rb_iseq_disasm(iseq->self);
-    }
-    else if (rb_obj_is_proc(body)) {
+    if (rb_obj_is_proc(body)) {
 	rb_proc_t *proc;
 	VALUE iseqval;
 	GetProcPtr(body, proc);
@@ -1024,6 +1021,9 @@ iseq_s_disasm(VALUE klass, VALUE body)
 	    ret = rb_iseq_disasm(iseqval);
 	}
     }
+    else if ((iseq = rb_method_get_iseq(body)) != 0) {
+	ret = rb_iseq_disasm(iseq->self);
+    }
 
     return ret;
 }
diff --git a/version.h b/version.h
index 0c552c36f4..7861703fec 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_RELEASE_DATE "2010-01-20"
+#define RUBY_RELEASE_DATE "2010-01-21"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2010
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 20
+#define RUBY_RELEASE_DAY 21
 
 #include "ruby/version.h"