diff --git a/source/glest_game/type_instances/unit.cpp b/source/glest_game/type_instances/unit.cpp
index dc7f3a8e5..90477c53d 100644
--- a/source/glest_game/type_instances/unit.cpp
+++ b/source/glest_game/type_instances/unit.cpp
@@ -5479,7 +5479,7 @@ namespace Glest {
 		}
 
 		void Unit::exploreCells(bool forceRefresh) {
-			if (this->isOperative() == true) {
+			if (this->isAlive() == true) {
 				const Vec2i & newPos = this->getCenteredPos();
 				int sightRange =
 					this->getType()->getTotalSight(this->getTotalUpgrade());
diff --git a/source/glest_game/world/world.cpp b/source/glest_game/world/world.cpp
index b0810a7d9..1b5367f72 100644
--- a/source/glest_game/world/world.cpp
+++ b/source/glest_game/world/world.cpp
@@ -2686,9 +2686,7 @@ namespace Glest {
 					// compute fog of war render texture
 					if (fogOfWar == true &&
 						faction->getTeam() == thisTeamIndex &&
-						unit->isOperative() == true) {
-
-						//printf("computeFow unit->isOperative() == true\n");
+						unit->isAlive() == true) {
 
 						const FowAlphaCellsLookupItem &cellList = unit->getCachedFow();
 						for (std::map<Vec2i, float>::const_iterator iterMap = cellList.surfPosAlphaList.begin();