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-rw-r--r--gr-blocks/lib/vector_map_impl.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/gr-blocks/lib/vector_map_impl.h b/gr-blocks/lib/vector_map_impl.h
index 932eb0585a..6753e12a5d 100644
--- a/gr-blocks/lib/vector_map_impl.h
+++ b/gr-blocks/lib/vector_map_impl.h
@@ -20,8 +20,8 @@ namespace blocks {
class vector_map_impl : public vector_map
{
private:
- size_t d_item_size;
- std::vector<size_t> d_in_vlens;
+ const size_t d_item_size;
+ const std::vector<size_t> d_in_vlens;
std::vector<std::vector<std::vector<size_t>>> d_mapping;
gr::thread::mutex d_mutex; // mutex to protect set/work access