diff --git a/src/Interpreters/InterpreterSelectQuery.cpp b/src/Interpreters/InterpreterSelectQuery.cpp
index 35c8c32c65b..59d0b88bae7 100644
--- a/src/Interpreters/InterpreterSelectQuery.cpp
+++ b/src/Interpreters/InterpreterSelectQuery.cpp
@@ -272,6 +272,7 @@ InterpreterSelectQuery::InterpreterSelectQuery(
 
     query_info.ignore_projections = options.ignore_projections;
     query_info.is_projection_query = options.is_projection_query;
+    query_info.original_query = query_ptr->clone();
 
     initSettings();
     const Settings & settings = context->getSettingsRef();
diff --git a/src/Storages/MergeTree/MergeTreeData.cpp b/src/Storages/MergeTree/MergeTreeData.cpp
index ee55a6826c3..6503e6dca12 100644
--- a/src/Storages/MergeTree/MergeTreeData.cpp
+++ b/src/Storages/MergeTree/MergeTreeData.cpp
@@ -4531,7 +4531,7 @@ bool MergeTreeData::getQueryProcessingStageWithAggregateProjection(
     if (!settings.allow_experimental_projection_optimization || query_info.ignore_projections || query_info.is_projection_query)
         return false;
 
-    const auto & query_ptr = query_info.query;
+    const auto & query_ptr = query_info.original_query;
 
     if (auto * select = query_ptr->as<ASTSelectQuery>(); select)
     {
diff --git a/src/Storages/SelectQueryInfo.h b/src/Storages/SelectQueryInfo.h
index b08818a2baa..fe7b22d331b 100644
--- a/src/Storages/SelectQueryInfo.h
+++ b/src/Storages/SelectQueryInfo.h
@@ -133,6 +133,7 @@ struct SelectQueryInfo
 {
     ASTPtr query;
     ASTPtr view_query; /// Optimized VIEW query
+    ASTPtr original_query; /// Unmodified query for projection analysis
 
     /// Cluster for the query.
     ClusterPtr cluster;