diff --git a/Source/missiles.cpp b/Source/missiles.cpp
index 94bad1806..16b65d2a5 100644
--- a/Source/missiles.cpp
+++ b/Source/missiles.cpp
@@ -1872,7 +1872,7 @@ void AddTown(Missile &missile, const AddMissileParameter &parameter)
 			other._mirange = 0;
 	}
 	PutMissile(missile);
-	if (missile._misource == MyPlayerId && !missile._miDelFlag && leveltype != DTYPE_TOWN) {
+	if (missile.sourcePlayer() == MyPlayer && !missile._miDelFlag && leveltype != DTYPE_TOWN) {
 		if (!setlevel) {
 			NetSendCmdLocParam3(true, CMD_ACTIVATEPORTAL, missile.position.tile, currlevel, leveltype, 0);
 		} else {