diff --git a/lib/protocol/networks.js b/lib/protocol/networks.js
index 3851d1b9..cd503242 100644
--- a/lib/protocol/networks.js
+++ b/lib/protocol/networks.js
@@ -355,13 +355,6 @@ main.deployments = {
     startTime: 1479168000, // November 15th, 2016.
     timeout: 1510704000, // November 15th, 2017.
     force: false
-  },
-  mast: {
-    name: 'mast',
-    bit: 2,
-    startTime: 0xffffffff, // Far in the future
-    timeout: 0xffffffff,
-    force: false
   }
 };
 
@@ -374,7 +367,6 @@ main.deployments = {
 main.deploys = [
   main.deployments.csv,
   main.deployments.segwit,
-  main.deployments.mast,
   main.deployments.testdummy
 ];
 
@@ -583,20 +575,12 @@ testnet.deployments = {
     startTime: 1462060800, // May 1st 2016
     timeout: 1493596800, // May 1st 2017
     force: false
-  },
-  mast: {
-    name: 'mast',
-    bit: 2,
-    startTime: 0xffffffff, // Far in the future
-    timeout: 0xffffffff,
-    force: false
   }
 };
 
 testnet.deploys = [
   testnet.deployments.csv,
   testnet.deployments.segwit,
-  testnet.deployments.mast,
   testnet.deployments.testdummy
 ];
 
@@ -731,20 +715,12 @@ regtest.deployments = {
     startTime: 0,
     timeout: 0xffffffff,
     force: false
-  },
-  mast: {
-    name: 'mast',
-    bit: 2,
-    startTime: 0xffffffff, // Far in the future
-    timeout: 0xffffffff,
-    force: false
   }
 };
 
 regtest.deploys = [
   regtest.deployments.csv,
   regtest.deployments.segwit,
-  regtest.deployments.mast,
   regtest.deployments.testdummy
 ];
 
@@ -1023,20 +999,12 @@ simnet.deployments = {
     startTime: 0, // May 1st 2016
     timeout: 0xffffffff, // May 1st 2017
     force: false
-  },
-  mast: {
-    name: 'mast',
-    bit: 2,
-    startTime: 0xffffffff, // Far in the future
-    timeout: 0xffffffff,
-    force: false
   }
 };
 
 simnet.deploys = [
   simnet.deployments.csv,
   simnet.deployments.segwit,
-  simnet.deployments.mast,
   simnet.deployments.testdummy
 ];