diff --git a/charts/stable/transmission/templates/common.yaml b/charts/stable/transmission/templates/common.yaml
index 5e5e0d8c871..cf19cc0dca8 100644
--- a/charts/stable/transmission/templates/common.yaml
+++ b/charts/stable/transmission/templates/common.yaml
@@ -11,5 +11,12 @@
   {{- $_ := set $.Values.workload.main.podSpec.containers.main.probes.startup "httpHeaders" $headers -}}
 {{- end -}}
 
+{{- with .Values.workload.main.podSpec.containers.main.env.TRANSMISSION_RPC_WHITELIST -}}
+  {{- if not (contains .Values.chartContext.podCIDR .) }}
+    {{/* Append CIDR in front */}}
+    {{- $_ := set $.Values.workload.main.podSpec.containers.main.env.TRANSMISSION_RPC_WHITELIST (printf "%v,%v" .Values.chartContext.podCIDR .) }}
+  {{- end }}
+{{- end -}}
+
 {{/* Render the templates */}}
 {{ include "tc.v1.common.loader.apply" . }}