The central bank intervened on the foreign exchange market by buying euro at an average rate of 7.560478 kuna per euro, HNB said in a statement.
In August, HNB bought 126 million euro from banks, while in July it purchased of 101.5 million euro. In June it bought a total of 374 million euro in two interventions.
Following Wednesday's intervention, HNB has bought a total of 947 million euro so far this year.
($=0.8518 euro)