diff --git a/wp-admin/admin.php b/wp-admin/admin.php
index f48827a20..4b4b21d98 100644
--- a/wp-admin/admin.php
+++ b/wp-admin/admin.php
@@ -14,8 +14,10 @@
 if ( !defined('WP_ADMIN') )
 	define('WP_ADMIN', TRUE);
 
-if ( !defined('WP_NETWORK_ADMIN') )
+if ( !defined('WP_NETWORK_ADMIN') ) {
 	define('WP_NETWORK_ADMIN', FALSE);
+	define('WP_BLOG_ADMIN', TRUE);
+}
 
 if ( isset($_GET['import']) && !defined('WP_LOAD_IMPORTERS') )
 	define('WP_LOAD_IMPORTERS', true);
diff --git a/wp-includes/load.php b/wp-includes/load.php
index f12be0aa7..05415485d 100644
--- a/wp-includes/load.php
+++ b/wp-includes/load.php
@@ -553,7 +553,7 @@ function wp_clone( $object ) {
 }
 
 /**
- * Whether the current request is in WordPress admin Panel
+ * Whether the current request is for a network or blog admin page
  *
  * Does not inform on whether the user is an admin! Use capability checks to
  * tell if the user should be accessing a section or not.
@@ -569,7 +569,23 @@ function is_admin() {
 }
 
 /**
- * Whether the current request is in WordPress network admin Panel
+ * Whether the current request is for a blog admin screen /wp-admin/
+ *
+ * Does not inform on whether the user is a blog admin! Use capability checks to
+ * tell if the user should be accessing a section or not.
+ *
+ * @since 3.1.0
+ *
+ * @return bool True if inside WordPress network administration pages.
+ */
+function is_blog_admin() {
+	if ( defined( 'WP_BLOG_ADMIN' ) )
+		return WP_BLOG_ADMIN;
+	return false;
+}
+
+/**
+ * Whether the current request is for a network admin screen /wp-admin/network/
  *
  * Does not inform on whether the user is a network admin! Use capability checks to
  * tell if the user should be accessing a section or not.