diff --git a/src/mission.c b/src/mission.c
index c0e04e7..692b3f5 100644
--- a/src/mission.c
+++ b/src/mission.c
@@ -114,6 +114,10 @@ static void mission_freeData(MissionData* mission) {
     free(mission->name);
     mission->name = NULL;
   }
+  if(mission->lua) {
+    free(mission->lua);
+    mission->lua = NULL;
+  }
   if(mission->avail.planet) {
     free(mission->avail.planet);
     mission->avail.planet = NULL;