diff --git a/dbms/src/DataStreams/ConvertingBlockInputStream.cpp b/dbms/src/DataStreams/ConvertingBlockInputStream.cpp
index d46c3693f6e..ae4d2e592e0 100644
--- a/dbms/src/DataStreams/ConvertingBlockInputStream.cpp
+++ b/dbms/src/DataStreams/ConvertingBlockInputStream.cpp
@@ -103,7 +103,7 @@ Block ConvertingBlockInputStream::readImpl()
 
         ColumnPtr converted = castColumnWithDiagnostic(src_elem, res_elem, context);
 
-        if (isColumnConst(*src_elem.column) && !isColumnConst(*res_elem.column))
+        if (!isColumnConst(*res_elem.column))
             converted = recursiveMaterializeConstants(converted);
 
         res_elem.column = std::move(converted);