diff --git a/ChangeLog b/ChangeLog
index 74ed48328b..a8aab3b9e4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu May 13 09:45:27 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* win32/Makefile.sub: link with ffs.obj.
+
 Thu May 13 07:37:49 2010  Tanaka Akira  <akr@fsij.org>
 
 	* ext/sdbm/_sdbm.c: include unistd.h before sdbm.h for off_t.
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index fa86472947..5f216cd659 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -218,7 +218,7 @@ LIBS = oldnames.lib user32.lib advapi32.lib shell32.lib ws2_32.lib $(EXTLIBS)
 LIBS = unicows.lib $(LIBS)
 !endif
 !if !defined(MISSING)
-MISSING = acosh.obj cbrt.obj crypt.obj erf.obj lgamma_r.obj strlcat.obj strlcpy.obj tgamma.obj win32.obj langinfo.obj
+MISSING = acosh.obj cbrt.obj crypt.obj erf.obj ffs.obj langinfo.obj lgamma_r.obj strlcat.obj strlcpy.obj tgamma.obj win32.obj
 !endif
 
 ARFLAGS = -machine:$(MACHINE) -out: