diff --git a/data/part-9/1-inheritance.md b/data/part-9/1-inheritance.md
index bdbc065c1..b586f4c03 100644
--- a/data/part-9/1-inheritance.md
+++ b/data/part-9/1-inheritance.md
@@ -1454,7 +1454,7 @@ The exercise template contains a class `Warehouse`, which has the following cons
 
 
 <!-- - **public Varasto(double tilavuus)** - Luo tyhjän varaston, jonka vetoisuus eli tilavuus annetaan parametrina; sopimaton tilavuus (<=0) luo käyttökelvottoman varaston, jonka tilavuus on 0. -->
-- **public Warehouse(double capacity)** - Creates an empty warehouse, which has the capacity provided as a parameter; an invalid capacity (<=0) creates a useless warehouse, with the the capacity 0.
+- **public Warehouse(double capacity)** - Creates an empty warehouse, which has the capacity provided as a parameter; an invalid capacity (<=0) creates a useless warehouse, with the capacity 0.
 
 <!-- - **public double getSaldo()** - Palauttaa arvonaan varaston saldon, eli varastossa olevan tavaran tilavuuden. -->
 - **public double getBalance()** - Returns the balance of the warehouse, i.e. the capacity which is taken up by the items in the warehouse.