diff --git a/ChangeLog b/ChangeLog
index 64434b1f08..176d71a210 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Apr 16 15:19:39 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (NO_RUBY_VENDOR_LIB): fix missing comma.
+
 Mon Apr 16 12:17:12 2012  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
 
 	* lib/matrix.rb (hermitian?): Bug fix, patch by George Koehler
diff --git a/configure.in b/configure.in
index e7cb7455a0..c4692742e0 100644
--- a/configure.in
+++ b/configure.in
@@ -2912,7 +2912,7 @@ else
     AC_DEFINE_UNQUOTED(RUBY_SITE_LIB, ${RUBY_SITE_LIB_PATH} !<verconf>!)
 fi
 if test "x$VENDOR_DIR" = xno; then
-    AC_DEFINE(NO_RUBY_VENDOR_LIB !<verconf>!)
+    AC_DEFINE(NO_RUBY_VENDOR_LIB, [] !<verconf>!)
 else
     AC_DEFINE_UNQUOTED(RUBY_VENDOR_LIB, ${RUBY_VENDOR_LIB_PATH} !<verconf>!)
 fi