diff -ur a/metadata.xml b/metadata.xml
--- a/metadata.xml	2008-08-05 13:05:45.000000000 -0400
+++ b/metadata.xml	2009-12-14 21:25:05.477014111 -0500
@@ -3,7 +3,7 @@
 <pkgmetadata>
 <herd>postgresql</herd>
 <use>
-  <flag name='pg-intdatetime'>Enable --enable-integer-datetimes configure
-  option, which changes PG to use 64-bit integers for timestamp storage</flag>
+  <flag name='pg-legacytimestamps'>Use double precision floating-point numbers
+  instead of 64-bit integers for timestamp storage</flag>
 </use>
 </pkgmetadata>
diff -ur a/postgresql-base-8.4.2.ebuild b/postgresql-base-8.4.2.ebuild
--- a/postgresql-base-8.4.2.ebuild	2009-12-14 13:56:21.000000000 -0500
+++ b/postgresql-base-8.4.2.ebuild	2009-12-14 21:26:35.866164255 -0500
@@ -21,7 +21,7 @@
 	linguas_hr linguas_hu linguas_it linguas_ko linguas_nb linguas_pl
 	linguas_pt_BR linguas_ro linguas_ru linguas_sk linguas_sl linguas_sv
 	linguas_tr linguas_zh_CN linguas_zh_TW"
-IUSE="doc kerberos nls pam pg-intdatetime readline ssl threads zlib ldap ${IUSE_LINGUAS}"
+IUSE="doc kerberos nls pam pg-legacytimestamps readline ssl threads zlib ldap ${IUSE_LINGUAS}"
 RESTRICT="test"
 
 wanted_languages() {
@@ -82,7 +82,7 @@
 		$(use_with kerberos gssapi) \
 		"$(use_enable nls nls "$(wanted_languages)")" \
 		$(use_with pam) \
-		$(use_enable pg-intdatetime integer-datetimes ) \
+		$(use_enable !pg-legacytimestamps integer-datetimes) \
 		$(use_with ssl openssl) \
 		$(use_enable threads thread-safety) \
 		$(use_enable threads thread-safety-force) \