diff --git a/src/descrambler/capmt.c b/src/descrambler/capmt.c
index de54a3a6..e95132ea 100644
--- a/src/descrambler/capmt.c
+++ b/src/descrambler/capmt.c
@@ -898,6 +898,14 @@ capmt_service_start(service_t *s)
     return;
   tuner = lfe->lfe_adapter->la_dvb_number;
 
+  TAILQ_FOREACH(capmt, &capmts, capmt_link) {
+    LIST_FOREACH(ct, &capmt->capmt_services, ct_link) {
+      /* skip, if we already have this service */
+      if (ct->ct_service == t)
+        return;
+    }
+  }
+
   TAILQ_FOREACH(capmt, &capmts, capmt_link) {
     /* skip, if we're not active */
     if (!capmt->capmt_enabled)