diff --git a/lib/cmds/blockchain/blockchain.js b/lib/cmds/blockchain/blockchain.js
index ae83d0f80..b0b1ab6c6 100644
--- a/lib/cmds/blockchain/blockchain.js
+++ b/lib/cmds/blockchain/blockchain.js
@@ -56,15 +56,15 @@ var Blockchain = function(options) {
   }
 
   const spaceMessage = 'The path for %s in blockchain config contains spaces, please remove them';
-  if (this.config.datadir.indexOf(' ') > 0) {
+  if (this.config.datadir && this.config.datadir.indexOf(' ') > 0) {
     console.error(__(spaceMessage, 'datadir'));
     process.exit();
   }
-  if (this.config.account.password.indexOf(' ') > 0) {
+  if (this.config.account.password && this.config.account.password.indexOf(' ') > 0) {
     console.error(__(spaceMessage, 'account.password'));
     process.exit();
   }
-  if (this.config.genesisBlock.indexOf(' ') > 0) {
+  if (this.config.genesisBlock && this.config.genesisBlock.indexOf(' ') > 0) {
     console.error(__(spaceMessage, 'genesisBlock'));
     process.exit();
   }