diff --git a/example/contract.html b/example/contract.html
index 0135be0..097b66c 100644
--- a/example/contract.html
+++ b/example/contract.html
@@ -34,14 +34,18 @@
         // create contract
         document.getElementById('status').innerText = "transaction sent, waiting for confirmation";
         web3.eth.contract(abi).new({data: code}, function (err, contract) {
-            if (err) {
+            if(err) {
                 console.error(err);
                 return;
+
+            // callback fires twice, we only want the second call when the contract is deployed
+            } else if(contract.address){
+
+                myContract = contract;
+                console.log('address: ' + myContract.address);
+                document.getElementById('status').innerText = 'Mined!';
+                document.getElementById('call').style.visibility = 'visible';
             }
-            myContract = contract;
-            console.log('address: ' + myContract.address);
-            document.getElementById('status').innerText = 'Mined!';
-            document.getElementById('call').style.visibility = 'visible';
         });
     }
 
diff --git a/example/contract_array.html b/example/contract_array.html
index f321910..752eb9a 100644
--- a/example/contract_array.html
+++ b/example/contract_array.html
@@ -37,12 +37,16 @@
             if (err) {
                 console.error(err);
                 return;
-            }
-            myContract = contract;
-            console.log('address: ' + myContract.address);
 
-            document.getElementById('status').innerText = 'Mined!';
-            document.getElementById('call').style.visibility = 'visible';
+            // callback fires twice, we only want the second call when the contract is deployed
+            } else if(contract.address){
+
+                myContract = contract;
+                console.log('address: ' + myContract.address);
+
+                document.getElementById('status').innerText = 'Mined!';
+                document.getElementById('call').style.visibility = 'visible';
+            }
         });
     }
 
diff --git a/example/event_inc.html b/example/event_inc.html
index 0906927..bb3c99f 100644
--- a/example/event_inc.html
+++ b/example/event_inc.html
@@ -42,14 +42,17 @@
                 if (err) {
                     console.error(err);
                     return;
+
+                // callback fires twice, we only want the second call when the contract is deployed
+                } else if(contract.address){
+
+                    contract = c;
+                    console.log('address: ' + contract.address);
+                    document.getElementById('status').innerText = 'Mined!';
+                    document.getElementById('call').style.visibility = 'visible';
+
+                    inc = contract.Incremented({odd: true}, update);
                 }
-
-                contract = c;
-                console.log('address: ' + contract.address);
-                document.getElementById('status').innerText = 'Mined!';
-                document.getElementById('call').style.visibility = 'visible';
-
-                inc = contract.Incremented({odd: true}, update);
             });
         };