diff --git a/ChangeLog b/ChangeLog
index 628dfc16c0..6e5ca885cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Aug 20 01:19:22 2013  Tanaka Akira  <akr@fsij.org>
+
+	* configure.in: Define ac_cv_func_clock_gettime to yes for mingw*.
+
 Mon Aug 19 21:31:35 2013  Tanaka Akira  <akr@fsij.org>
 
 	* include/ruby/defines.h: Fix a compilation error with
diff --git a/configure.in b/configure.in
index 0957385ce1..491b7c3291 100644
--- a/configure.in
+++ b/configure.in
@@ -964,6 +964,7 @@ main()
 		ac_cv_func_gmtime_r=yes
 		rb_cv_large_fd_select=yes
 		ac_cv_type_struct_timeval=yes
+                ac_cv_func_clock_gettime=yes
 		AC_CHECK_TYPE([NET_LUID], [], [],
 			      [@%:@include <windows.h>
 		  	      @%:@include <iphlpapi.h>])