diff --git a/dbms/src/Parsers/ASTSubquery.cpp b/dbms/src/Parsers/ASTSubquery.cpp
index 2db425a8c59..7b90b8a931b 100644
--- a/dbms/src/Parsers/ASTSubquery.cpp
+++ b/dbms/src/Parsers/ASTSubquery.cpp
@@ -6,6 +6,10 @@ namespace DB
 
 String ASTSubquery::getColumnNameImpl() const
 {
+    /// This is a hack. We use alias, if available, because otherwise tree could change during analysis.
+    if (!alias.empty())
+        return alias;
+
     Hash hash = getTreeHash();
     return "__subquery_" + toString(hash.first) + "_" + toString(hash.second);
 }