diff --git a/wp-includes/query.php b/wp-includes/query.php
index 7fa51d627a..da8749a0f2 100644
--- a/wp-includes/query.php
+++ b/wp-includes/query.php
@@ -375,7 +375,7 @@ class WP_Query {
 			// If year, month, day, hour, minute, and second are set, a single 
 			// post is being queried.        
 			$this->is_single = true;
-		} elseif ('' != $qv['static'] || '' != $qv['pagename'] || '' != $qv['page_id']) {
+		} elseif ('' != $qv['static'] || '' != $qv['pagename'] || (int) $qv['page_id']) {
 			$this->is_page = true;
 			$this->is_single = false;
 		} elseif (!empty($qv['s'])) {