diff --git a/contracts/token/GrantableToken.sol b/contracts/token/GrantableToken.sol
index 9f2111b8d..a97c2ed62 100644
--- a/contracts/token/GrantableToken.sol
+++ b/contracts/token/GrantableToken.sol
@@ -83,7 +83,7 @@ contract GrantableToken is StandardToken {
     }
   }
 
-  function transferrableTokens(address holder, uint64 time) constant public returns (uint256 nonVested) {
+  function transferableTokens(address holder, uint64 time) constant public returns (uint256 nonVested) {
     uint256 grantIndex = grants[holder].length;
 
     for (uint256 i = 0; i < grantIndex; i++) {
@@ -94,7 +94,7 @@ contract GrantableToken is StandardToken {
   }
 
   function transfer(address _to, uint _value) returns (bool success){
-    if (_value > transferrableTokens(msg.sender, uint64(now))) throw;
+    if (_value > transferableTokens(msg.sender, uint64(now))) throw;
 
     return super.transfer(_to, _value);
   }
diff --git a/test/GrantableToken.js b/test/GrantableToken.js
index 1f423e116..8f7ee4ac7 100644
--- a/test/GrantableToken.js
+++ b/test/GrantableToken.js
@@ -19,7 +19,7 @@ contract('GrantableToken', function(accounts) {
     await token.grantTokens(receiver, tokenAmount, { from: granter })
 
     assert.equal(await token.balanceOf(receiver), tokenAmount);
-    assert.equal(await token.transferrableTokens(receiver, +new Date()/1000), tokenAmount);
+    assert.equal(await token.transferableTokens(receiver, +new Date()/1000), tokenAmount);
   })
 
   describe('getting a token grant', async () => {
@@ -34,12 +34,12 @@ contract('GrantableToken', function(accounts) {
       assert.equal(await token.balanceOf(receiver), tokenAmount);
     })
 
-    it('has 0 transferrable tokens before cliff', async () => {
-      assert.equal(await token.transferrableTokens(receiver, now), 0);
+    it('has 0 transferable tokens before cliff', async () => {
+      assert.equal(await token.transferableTokens(receiver, now), 0);
     })
 
-    it('all tokens are transferrable after vesting', async () => {
-      assert.equal(await token.transferrableTokens(receiver, now + vesting + 1), tokenAmount);
+    it('all tokens are transferable after vesting', async () => {
+      assert.equal(await token.transferableTokens(receiver, now + vesting + 1), tokenAmount);
     })
 
     it('throws when trying to transfer non vested tokens', async () => {