diff --git a/source/platform/plantern.cpp b/source/platform/plantern.cpp
index ea95c5e35..df630423e 100644
--- a/source/platform/plantern.cpp
+++ b/source/platform/plantern.cpp
@@ -82,15 +82,10 @@ void CNpcLanternPlatform::setWaypoints( sThingPlatform *ThisPlatform )
 		init( startPos );
 	}
 
-	s32 minX, maxX, minY, maxY;
-
-	m_npcPath.getPathXExtents( &minX, &maxX );
-	m_npcPath.getPathYExtents( &minY, &maxY );
-
-	m_thinkArea.x1 = minX;
-	m_thinkArea.x2 = maxX;
-	m_thinkArea.y1 = minY;
-	m_thinkArea.y2 = maxY;
+	m_thinkArea.x1 = Pos.vx - m_length;
+	m_thinkArea.x2 = Pos.vx + m_length;
+	m_thinkArea.y1 = Pos.vy - m_length;
+	m_thinkArea.y2 = Pos.vy + m_length;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////