diff --git a/roles/pvc/templates/patroni/prometheus.env.j2 b/roles/pvc/templates/patroni/prometheus.env.j2
index 2b5abd1..1760214 100644
--- a/roles/pvc/templates/patroni/prometheus.env.j2
+++ b/roles/pvc/templates/patroni/prometheus.env.j2
@@ -1,5 +1,5 @@
 # Prometheus Postgres exporter configuration
 # {{ ansible_managed }}
 
-DATA_SURCE_NAME="user=postgres host=/run/postgresql dbname=postgres"
+DATA_SOURCE_NAME="user=postgres host=/run/postgresql dbname=postgres"
 ARGS=""