diff --git a/src/runtime.c b/src/runtime.c
index a374984f..8e3a4def 100644
--- a/src/runtime.c
+++ b/src/runtime.c
@@ -140,6 +140,7 @@ void populateCoreInfo(struct hs_scratch *s, const struct RoseEngine *rose,
     s->som_set_now_offset = ~0ULL;
     s->deduper.current_report_offset = ~0ULL;
     s->deduper.som_log_dirty = 1; /* som logs have not been cleared */
+    s->fdr_conf = NULL;
 
     // Rose program execution (used for some report paths) depends on these
     // values being initialised.