diff --git a/libraries/classes/Sql.php b/libraries/classes/Sql.php
index a3883fc5e9..991dd06599 100644
--- a/libraries/classes/Sql.php
+++ b/libraries/classes/Sql.php
@@ -701,7 +701,7 @@ class Sql
                     $statement->limit = false;
                 }
 
-                if (! $statementInfo->isGroup && count($statement->expr) === 1) {
+                if (! $statementInfo->isGroup && ! $statementInfo->distinct && count($statement->expr) === 1) {
                     $statement->expr[0] = new Expression();
                     $statement->expr[0]->expr = '1';
                 }