diff --git a/wp-admin/post.php b/wp-admin/post.php
index 0dfb6f05e3..be003b4bf3 100644
--- a/wp-admin/post.php
+++ b/wp-admin/post.php
@@ -308,7 +308,7 @@ switch($action) {
             $hh = ($hh > 23) ? $hh - 24 : $hh;
             $mn = ($mn > 59) ? $mn - 60 : $mn;
             $ss = ($ss > 59) ? $ss - 60 : $ss;
-            $datemodif = ", post_date = '".get_gmt_from_date('$aa-$mm-$jj $hh:$mn:$ss')."'";
+            $datemodif = ", post_date = '".get_gmt_from_date("$aa-$mm-$jj $hh:$mn:$ss")."'";
         } else {
             $datemodif = '';
         }