diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index a1e8dd3c29..dafdea5a83 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -1907,9 +1907,9 @@ function get_space_allowed() {
 		$space_allowed = get_site_option( 'blog_upload_space' );
 
 	if ( empty( $space_allowed ) || ! is_numeric( $space_allowed ) )
-		$space_allowed = 50;
+		$space_allowed = 100;
 
-	return $space_allowed;
+	return apply_filters( 'get_space_allowed', $space_allowed );
 }
 
 /**