diff --git a/lib/blocks.js b/lib/blocks.js
index 82da845..418beee 100644
--- a/lib/blocks.js
+++ b/lib/blocks.js
@@ -175,7 +175,7 @@ BlockController.prototype.blockIndex = function(req, res) {
   var self = this;
   var height = req.params.height;
   self._header.getBlockHeader(parseInt(height), function(err, info) {
-    if (err) {
+    if (err || !info) {
       return self.common.handleErrors(err, res);
     }
     res.jsonp({