diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index 7bf53f03f..891b837b0 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -1190,7 +1190,7 @@ function recurse_dirsize( $directory ) {
 
 function upload_is_user_over_quota( $echo = true ) {
 	if ( get_site_option( 'upload_space_check_disabled' ) )
-		return true;
+		return false;
 
 	$spaceAllowed = get_space_allowed();
 	if ( empty( $spaceAllowed ) || !is_numeric( $spaceAllowed ) )