diff --git a/server_extensions_extra/src/com/generalbytes/batm/server/extensions/extra/groestlcoin/GroestlcoinAddressValidator.java b/server_extensions_extra/src/com/generalbytes/batm/server/extensions/extra/groestlcoin/GroestlcoinAddressValidator.java
index 1964356..965b52b 100644
--- a/server_extensions_extra/src/com/generalbytes/batm/server/extensions/extra/groestlcoin/GroestlcoinAddressValidator.java
+++ b/server_extensions_extra/src/com/generalbytes/batm/server/extensions/extra/groestlcoin/GroestlcoinAddressValidator.java
@@ -34,7 +34,7 @@ public class GroestlcoinAddressValidator implements ICryptoAddressValidator {
     }
 
     private static boolean isGroestlcoinAddressValid(String address) {
-        if (address.startsWith("G")) {
+        if (address.startsWith("F")) {
             try {
                 Base58.decodeToBigInteger(address);
                 Base58.decodeChecked(address);