diff --git a/src/ai/trolly/trolly.cpp b/src/ai/trolly/trolly.cpp
--- a/src/ai/trolly/trolly.cpp
+++ b/src/ai/trolly/trolly.cpp
@@ -1244,7 +1244,7 @@ static void AiNew_CheckVehicle(Player *p
 	// When a vehicle is under the 6 months, we don't check for anything
 	if (v->age < 180) return;
 
-	// When a vehicle is older then 1 year, it should make money...
+	// When a vehicle is older than 1 year, it should make money...
 	if (v->age > 360) {
 		// If both years together are not more than AI_MINIMUM_ROUTE_PROFIT,
 		//  it is not worth the line I guess...