diff --git a/ChangeLog b/ChangeLog
index c889009b2f..cf6c907886 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Nov 24 21:25:21 2009  Tanaka Akira  <akr@fsij.org>
+
+	* error.c: include errno.h at beginning.
+
 Tue Nov 24 20:11:37 2009  Tanaka Akira  <akr@fsij.org>
 
 	* strftime.c: %Y format a year with 4 digits at least.
diff --git a/error.c b/error.c
index 55834a3cd8..3fcd18478d 100644
--- a/error.c
+++ b/error.c
@@ -18,6 +18,8 @@
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>
 #endif
+#include <errno.h>
+
 #ifndef EXIT_SUCCESS
 #define EXIT_SUCCESS 0
 #endif
@@ -374,8 +376,6 @@ rb_check_typeddata(VALUE obj, const rb_data_type_t *data_type)
 }
 
 /* exception classes */
-#include <errno.h>
-
 VALUE rb_eException;
 VALUE rb_eSystemExit;
 VALUE rb_eInterrupt;