diff --git a/tsm-archive/templates/dsm.sys.j2 b/tsm-archive/templates/dsm.sys.j2
index 064051ecc55f649d6f6d2589f5a3bff72db8d326..f9ba92afa02bac9c116e4751d13007012613b24b 100644
--- a/tsm-archive/templates/dsm.sys.j2
+++ b/tsm-archive/templates/dsm.sys.j2
@@ -11,7 +11,7 @@
 DEFAULTSERVER                 bas{{ archivenode }}.itc.rwth-aachen.de
 SERVERNAME                    bas{{ archivenode }}.itc.rwth-aachen.de
 TCPSERVERADDRESS              bas{{ archivenode }}.itc.rwth-aachen.de
-TCPPORT                       {{ archiveport|default('15' + str(archivenode)) }}
+TCPPORT                       {{ archiveport|default('15' ~ archivenode) }}
 
 
 * Die folgenden 4 Eintrage unveraendert lassen
diff --git a/tsm-backup/templates/dsm.sys.j2 b/tsm-backup/templates/dsm.sys.j2
index 0318c666259571bf5d364c9bc1f804424d275c78..b8fbb841d8e2941475020714f16ba991b6196e49 100644
--- a/tsm-backup/templates/dsm.sys.j2
+++ b/tsm-backup/templates/dsm.sys.j2
@@ -11,7 +11,7 @@
 DEFAULTSERVER                 bas{{ backupnode }}.itc.rwth-aachen.de
 SERVERNAME                    bas{{ backupnode }}.itc.rwth-aachen.de
 TCPSERVERADDRESS              bas{{ backupnode }}.itc.rwth-aachen.de
-TCPPORT                       {{ backupport|default('15' + str(backupnode)) }}
+TCPPORT                       {{ backupport|default('15' ~ backupnode) }}
 
 * Die folgenden 4 Eintrage unveraendert lassen
 * ---------------------------------------------------------------