diff --git a/src/Entities/Entity.h b/src/Entities/Entity.h
index ba74a38a9..e76279c28 100644
--- a/src/Entities/Entity.h
+++ b/src/Entities/Entity.h
@@ -505,7 +505,7 @@ private:
 	// Height of the entity (Y axis)
 	double m_Height;
 
-	// If a player hit a entity, the entity become a invulnerable of 10 ticks
+	// If a player hit a entity, the entity become a invulnerable of 10 ticks. While this ticks, a player can't hit this entity.
 	int m_InvulnerableTicks;
 } ;  // tolua_export