diff --git a/scripts/legacyworlds.xml b/scripts/legacyworlds.xml
index f328dd4..bc03fdb 100644
--- a/scripts/legacyworlds.xml
+++ b/scripts/legacyworlds.xml
@@ -96,6 +96,8 @@
 			<Param name="maxplayers" value="0" />
 			<!-- Maximum amount of systems (0 for unlimited) -->
 			<Param name="maxsystems" value="0" />
+			<!-- Amount of free systems that trigger universe generation -->
+			<Param name="minsystems" value="5" />
 			<!-- Partial tech graph (0 for complete tech graph, 1 for partial) -->
 			<Param name="partialtechs" value="1" />
 			<!-- Initial amount of money for players joining the game (0 = default) -->