diff --git a/overlays/uksouth-prod/txm/harmonia/env.ini b/overlays/uksouth-prod/txm/harmonia/env.ini
index 7c833855d9..ccbfc2b11a 100644
--- a/overlays/uksouth-prod/txm/harmonia/env.ini
+++ b/overlays/uksouth-prod/txm/harmonia/env.ini
@@ -13,3 +13,4 @@ TXM_RABBITMQ_HOST=dummy
 TXM_RABBITMQ_PORT=1234
 TXM_RABBITMQ_USER=dummy
 TXM_RABBITMQ_PASS=dummy
+SENTRY_SAMPLE_RATE=1.0