diff --git a/contracts/votingMachines/GenesisProtocolInterface.sol b/contracts/votingMachines/GenesisProtocolInterface.sol
new file mode 100644
index 0000000..58a7ea3
--- /dev/null
+++ b/contracts/votingMachines/GenesisProtocolInterface.sol
@@ -0,0 +1,11 @@
+pragma solidity 0.5.17;
+
+
+contract GenesisProtocolInterface {
+    function setParameters(
+        uint[11] calldata _params, //use array here due to stack too deep issue.
+        address _voteOnBehalf
+    )
+    external
+    returns(bytes32);
+}
diff --git a/contracts/votingMachines/GenesisProtocolLogic.sol b/contracts/votingMachines/GenesisProtocolLogic.sol
index 80e18fe..f2c0663 100644
--- a/contracts/votingMachines/GenesisProtocolLogic.sol
+++ b/contracts/votingMachines/GenesisProtocolLogic.sol
@@ -264,6 +264,12 @@ contract GenesisProtocolLogic is IntVoteInterface {
         require(_params[9] > 0, "daoBountyConst should be > 0");
 
         bytes32 paramsHash = getParametersHash(_params, _voteOnBehalf);
+
+        if (parameters[paramsHash].queuedVoteRequiredPercentage > 0) {
+            //parameters already been set
+            return paramsHash;
+        }
+
         //set a limit for power for a given alpha to prevent overflow
         uint256 limitExponent = 172;//for alpha less or equal 2
         uint256 j = 2;
diff --git a/package-lock.json b/package-lock.json
index ac60690..958fcf6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@daostack/infra",
-  "version": "0.0.1-rc.19",
+  "version": "0.0.1-rc.20",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 6f2327c..a8433a8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@daostack/infra",
-  "version": "0.0.1-rc.19",
+  "version": "0.0.1-rc.20",
   "description": "Base layer DAO's components",
   "files": [
     "contracts/",
diff --git a/test/genesisprotocol.js b/test/genesisprotocol.js
index b91e132..fe58c60 100644
--- a/test/genesisprotocol.js
+++ b/test/genesisprotocol.js
@@ -618,6 +618,22 @@ contract('GenesisProtocol', accounts => {
 
   it("Non-existent parameters hash shouldn't work - propose with wrong organization", async function() {
     var testSetup = await setup(accounts);
+    await testSetup.genesisProtocolCallbacks.setParameters(
+      [
+        50,
+        60,
+        60,
+        0,
+        2000,
+        0,
+        60,
+        10,
+        15,
+        1000,
+        0
+      ],
+      helpers.NULL_ADDRESS
+    );
     await testSetup.genesisProtocolCallbacks.propose(2, testSetup.genesisProtocolParams.paramsHash,helpers.NULL_ADDRESS,accounts[0],helpers.NULL_ADDRESS);
 
     try {