diff --git a/debian/pg_createconfig_patroni b/debian/pg_createconfig_patroni
index 73ecee1..6fc8a7a 100755
--- a/debian/pg_createconfig_patroni
+++ b/debian/pg_createconfig_patroni
@@ -60,7 +60,7 @@ fi
 
 if [ -z "$PORT" ]; then
     # try to guess next free port
-    PORT=$(($(pg_lsclusters | tail -n +2 | awk '{print $3}' | sort -n | tail -1) + 1))
+    PORT=$(($(pg_lsclusters -h | awk '{print $3}' | sort -n | tail -1) + 1))
     if [ "$PORT" -eq 1 ]; then
 	# No cluster exists yet, use default port
 	PORT=5432