diff --git a/src/Interpreters/Cache/QueryCache.cpp b/src/Interpreters/Cache/QueryCache.cpp
index ba5388847f5..fede871aba3 100644
--- a/src/Interpreters/Cache/QueryCache.cpp
+++ b/src/Interpreters/Cache/QueryCache.cpp
@@ -242,8 +242,9 @@ void QueryCache::Writer::finalizeWrite()
         Chunks squashed_chunks;
         size_t rows_remaining_in_squashed = 0; /// how many further rows can the last squashed chunk consume until it reaches max_block_size
 
-        for (const auto & chunk : *query_result)
+        for (auto & chunk : *query_result)
         {
+            convertToFullIfSparse(chunk);
             const size_t rows_chunk = chunk.getNumRows();
             size_t rows_chunk_processed = 0;
 
diff --git a/tests/queries/0_stateless/02708_query_cache_sparse_columns.reference b/tests/queries/0_stateless/02708_query_cache_sparse_columns.reference
new file mode 100644
index 00000000000..d00491fd7e5
--- /dev/null
+++ b/tests/queries/0_stateless/02708_query_cache_sparse_columns.reference
@@ -0,0 +1 @@
+1
diff --git a/tests/queries/0_stateless/02708_query_cache_sparse_columns.sql b/tests/queries/0_stateless/02708_query_cache_sparse_columns.sql
new file mode 100644
index 00000000000..952c3227852
--- /dev/null
+++ b/tests/queries/0_stateless/02708_query_cache_sparse_columns.sql
@@ -0,0 +1,23 @@
+-- Tags: no-parallel
+
+DROP TABLE IF EXISTS t_cache_sparse;
+SYSTEM DROP QUERY CACHE;
+
+CREATE TABLE t_cache_sparse (id UInt64, v UInt64)
+ENGINE = MergeTree ORDER BY id
+SETTINGS ratio_of_defaults_for_sparse_serialization = 0.9;
+
+SYSTEM STOP MERGES t_cache_sparse;
+
+INSERT INTO t_cache_sparse SELECT number, number FROM numbers(10000);
+INSERT INTO t_cache_sparse SELECT number, 0 FROM numbers(10000);
+
+SET allow_experimental_query_cache = 1;
+SET use_query_cache = 1;
+SET max_threads = 1;
+
+SELECT v FROM t_cache_sparse FORMAT Null;
+SELECT v FROM t_cache_sparse FORMAT Null;
+SELECT count() FROM system.query_cache WHERE query LIKE 'SELECT v FROM t_cache_sparse%';
+
+DROP TABLE t_cache_sparse;