diff --git a/source/glest_game/type_instances/unit.cpp b/source/glest_game/type_instances/unit.cpp
index 0c0b4b6b..486cf1c0 100644
--- a/source/glest_game/type_instances/unit.cpp
+++ b/source/glest_game/type_instances/unit.cpp
@@ -1131,8 +1131,9 @@ FowAlphaCellsLookupItem Unit::getFogOfWarRadius(bool useCache) const {
 
 void Unit::calculateFogOfWarRadius() {
 	if(game->getWorld()->getFogOfWar() == true) {
-		if(Config::getInstance().getBool("EnableFowCache","true") == true && this->pos != this->lastPos) {
+		if(Config::getInstance().getBool("EnableFowCache","true") == true && this->pos != this->cachedFowPos) {
 			cachedFow = getFogOfWarRadius(false);
+			this->cachedFowPos = this->pos;
 		}
 	}
 }
diff --git a/source/glest_game/type_instances/unit.h b/source/glest_game/type_instances/unit.h
index ef0e5ac4..140d89a2 100644
--- a/source/glest_game/type_instances/unit.h
+++ b/source/glest_game/type_instances/unit.h
@@ -457,6 +457,7 @@ private:
 	int pathFindRefreshCellCount;
 
 	FowAlphaCellsLookupItem cachedFow;
+	Vec2i cachedFowPos;
 
 public:
     Unit(int id, UnitPathInterface *path, const Vec2i &pos, const UnitType *type, Faction *faction, Map *map, CardinalDir placeFacing);