diff --git a/src/index.html b/src/index.html
index 177d9126..8195d79e 100644
--- a/src/index.html
+++ b/src/index.html
@@ -24,12 +24,10 @@ <h2>Mnemonic</h2>
                         <div class="form-group">
                             <div class="col-sm-2"></div>
                             <div class="col-sm-10">
-                                <p>You can enter an existing BIP39 mnemonic, or generate a new random one. Typing your own twelve words will probably not work how you expect, since the words require a particular structure (the last word contains a checksum).</p>
-                                <p>
-                                    For more info see the
+                                <p>You can enter an existing mnemonic, or generate a new random one.</p>
+                                <p>Typing your own twelve words will probably not work how you expect, since BIP39 requires the words to have a particular structure (the last word contains a checksum). For more info see the
                                     <a href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki" target="_blank">BIP39 spec</a>.
                                 </p>
-
                                 <p>
                                     <span class="text-danger">
                                         If you share the information generated by this page with anyone, they can steal your assets.
@@ -211,6 +209,15 @@ <h2>Mnemonic</h2>
                                 </label>
                             </div>
                         </div>
+                        <div class="form-group">
+                            <div class="col-sm-2"></div>
+                            <div class="col-sm-10 checkbox">
+                                <label>
+                                    <input type="checkbox" class="allowCustomMnemonic">
+                                    <span>Allow custom mnemonic</span>
+                                </label>
+                            </div>
+                        </div>
                         <div class="form-group">
                             <label class="col-sm-2 control-label">Mnemonic Language</label>
                             <div class="col-sm-10 languages">
diff --git a/src/js/index.js b/src/js/index.js
index 29aab254..008d876f 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -51,6 +51,7 @@
     DOM.entropyFilterWarning = DOM.entropyContainer.find(".filter-warning");
     DOM.phrase = $(".phrase");
     DOM.autoCompute = $(".autoCompute");
+    DOM.allowCustomMnemonic = $(".allowCustomMnemonic");
     DOM.splitMnemonic = $(".splitMnemonic");
     DOM.showSplitMnemonic = $(".showSplitMnemonic");
     DOM.phraseSplit = $(".phraseSplit");
@@ -148,6 +149,7 @@
         DOM.bip32Client.on("change", bip32ClientChanged);
         DOM.useEntropy.on("change", setEntropyVisibility);
         DOM.autoCompute.on("change", delayedPhraseChanged);
+        DOM.allowCustomMnemonic.on("change", delayedPhraseChanged);
         DOM.entropy.on("input", delayedEntropyChanged);
         DOM.entropyMnemonicLength.on("change", entropyChanged);
         DOM.pbkdf2Rounds.on("change", pbkdf2RoundsChanged);
@@ -240,6 +242,10 @@
         return DOM.autoCompute.prop("checked");
     }
 
+    function isCustomMnemonicAllowed() {
+        return DOM.allowCustomMnemonic.prop("checked");
+    }
+
     function setEntropyVisibility() {
         if (isUsingOwnEntropy()) {
             DOM.entropyContainer.removeClass("hidden");
@@ -862,7 +868,7 @@
         // Check the words are valid
         var properPhrase = wordArrayToPhrase(words);
         var isValid = mnemonic.check(properPhrase);
-        if (!isValid) {
+        if (!isValid && !isCustomMnemonicAllowed()) {
             return "Invalid mnemonic";
         }
         return false;
@@ -2987,7 +2993,7 @@
             },
         },
         {
-            name: "LBC - Library Credits",
+            name: "LBC - LBRY Credits",
             onSelect: function() {
                 network = libs.bitcoin.networks.lbry;
                 setHdCoin(140);
diff --git a/tests/spec/tests.js b/tests/spec/tests.js
index 72b487b1..d1da8816 100644
--- a/tests/spec/tests.js
+++ b/tests/spec/tests.js
@@ -1438,9 +1438,9 @@ it('Allows selection of Landcoin', function(done) {
     };
     testNetwork(done, params);
 });
-it('Allows selection of Library Credits', function(done) {
+it('Allows selection of LBRY Credits', function(done) {
     var params = {
-        selectText: "LBC - Library Credits",
+        selectText: "LBC - LBRY Credits",
         phrase: "abandon abandon ability",
         firstAddress: "bQJEQrHDJyHdqycB32uysh1SWn8Ln8LMdg",
         firstPubKey: "02abd5018c033f59f49f28ee76d93c41323890928e25c171ccc7c61ed753cde8ad",