diff --git a/src/wp-admin/setup-config.php b/src/wp-admin/setup-config.php
index 30a1b79502..ca18f84139 100644
--- a/src/wp-admin/setup-config.php
+++ b/src/wp-admin/setup-config.php
@@ -322,7 +322,7 @@ switch ( $step ) {
 		}
 
 		$errors = $wpdb->suppress_errors();
-		$wpdb->query( "SELECT $prefix" );
+		$wpdb->prepare( "SELECT $prefix" );
 		$wpdb->suppress_errors( $errors );
 
 		if ( ! $wpdb->last_error ) {