diff --git a/src/engine.cpp b/src/engine.cpp
index e1220f2b7e..72318de08c 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -321,7 +321,7 @@ uint Engine::DetermineCapacity(const Vehicle *v, uint16_t *mail_capacity, CargoI
 		capacity = (capacity + default_multiplier / 2) / default_multiplier;
 	}
 
-	return capacity;
+	return capacity * 8;
 }
 
 /**