diff --git a/Phantasma.Business/src/Blockchain/Contracts/Native/ExchangeContract.cs b/Phantasma.Business/src/Blockchain/Contracts/Native/ExchangeContract.cs
index 8aaa2529..58605cc3 100644
--- a/Phantasma.Business/src/Blockchain/Contracts/Native/ExchangeContract.cs
+++ b/Phantasma.Business/src/Blockchain/Contracts/Native/ExchangeContract.cs
@@ -117,9 +117,9 @@ private void ValidateExchangeParameters(string id, string name, BigInteger total
         public void CreateExchange(Address from, string id, string name, BigInteger totalFee,
             BigInteger feePercentForExchange, BigInteger feePercentForPool)
         {
-            if (Runtime.ProtocolVersion >= 15)
+            if (Runtime.ProtocolVersion >= 16)
             {
-                Runtime.Expect(false, "exchange not supported on this protocol version");
+                Runtime.Expect(false, "This method is not available in this version of the DEX");
                 return;
             }
             
@@ -152,9 +152,9 @@ public void CreateExchange(Address from, string id, string name, BigInteger tota
         public void EditExchange(Address from, string id, string name, BigInteger totalFee,
             BigInteger feePercentForExchange, BigInteger feePercentForPool)
         {
-            if (Runtime.ProtocolVersion >= 15)
+            if (Runtime.ProtocolVersion >= 16)
             {
-                Runtime.Expect(false, "exchange not supported on this protocol version");
+                Runtime.Expect(false, "This method is not available in this version of the DEX");
                 return;
             }