diff --git a/ChangeLog b/ChangeLog
index 81cf7e30d8..1fc799d947 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Fri Oct 17 18:07:17 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Fri Oct 17 18:14:57 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (uncommon.mk): ignores failures at loading.
 
 	* test/rubygems/gemutilities.rb (RubyGemTestCase#build_rake_in):
 	  get rid of interference with other tests.
diff --git a/configure.in b/configure.in
index 6783b82994..10a0d31003 100644
--- a/configure.in
+++ b/configure.in
@@ -1897,7 +1897,7 @@ dnl (
     dnl (
     *yes*)
 	echo "include Makefile" > GNUmakefile
-	echo "include uncommon.mk" >> GNUmakefile
+	echo "-include uncommon.mk" >> GNUmakefile
 	gnumake=yes;;
     dnl (
     *)
diff --git a/cygwin/GNUmakefile.in b/cygwin/GNUmakefile.in
index f6883492b7..1e98a115a7 100644
--- a/cygwin/GNUmakefile.in
+++ b/cygwin/GNUmakefile.in
@@ -1,5 +1,5 @@
 include Makefile
-include uncommon.mk
+-include uncommon.mk
 
 ENABLE_SHARED=@ENABLE_SHARED@
 DLLWRAP = @DLLWRAP@ --target=@target_os@