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-rw-r--r--exporting/mongodb/mongodb.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/exporting/mongodb/mongodb.c b/exporting/mongodb/mongodb.c
index aab1770d2..850d07fb3 100644
--- a/exporting/mongodb/mongodb.c
+++ b/exporting/mongodb/mongodb.c
@@ -99,6 +99,7 @@ int init_mongodb_instance(struct instance *instance)
instance->metric_formatting = format_dimension_stored_json_plaintext;
instance->end_chart_formatting = NULL;
+ instance->variables_formatting = NULL;
instance->end_host_formatting = flush_host_labels;
instance->end_batch_formatting = format_batch_mongodb;