diff --git a/lib/bcoin/abstractblock.js b/lib/bcoin/abstractblock.js
index fc68ee19..1edd761f 100644
--- a/lib/bcoin/abstractblock.js
+++ b/lib/bcoin/abstractblock.js
@@ -115,7 +115,7 @@ AbstractBlock.prototype.verifyHeaders = function verifyHeaders(ret) {
     ret = {};
 
   // Check proof of work
-  if (!utils.testTarget(this.bits, this.hash())) {
+  if (!utils.testTarget(this.hash(), this.bits)) {
     ret.reason = 'high-hash';
     ret.score = 50;
     return false;
diff --git a/lib/bcoin/utils.js b/lib/bcoin/utils.js
index c0de575c..e29c1204 100644
--- a/lib/bcoin/utils.js
+++ b/lib/bcoin/utils.js
@@ -1220,18 +1220,18 @@ utils.toCompact = function toCompact(num) {
 
 /**
  * Test hash against a target.
- * @param {BN|Number} target - Compact number or big number.
  * @param {Buffer|Hash} hash
+ * @param {BN|Number} target - Compact number or big number.
  * @returns {Boolean} True if hash is less than target.
  */
 
-utils.testTarget = function testTarget(target, hash) {
-  if (typeof target === 'number')
-    target = utils.fromCompact(target);
-
+utils.testTarget = function testTarget(hash, target) {
   if (typeof hash === 'string')
     hash = new Buffer(hash, 'hex');
 
+  if (typeof target === 'number')
+    target = utils.fromCompact(target);
+
   return new bn(hash, 'le').cmp(target) < 0;
 };
 
diff --git a/test/utils-test.js b/test/utils-test.js
index f3fc1f9e..523c85eb 100644
--- a/test/utils-test.js
+++ b/test/utils-test.js
@@ -18,7 +18,7 @@ describe('Utils', function() {
       'hex'
     );
     var target = utils.fromCompact(bits);
-    assert(utils.testTarget(target, hash));
+    assert(utils.testTarget(hash, target));
   });
 
   it('should convert satoshi to btc', function() {