diff --git a/lib/bcoin/utils.js b/lib/bcoin/utils.js
index 4915388e..9715c78f 100644
--- a/lib/bcoin/utils.js
+++ b/lib/bcoin/utils.js
@@ -1091,16 +1091,18 @@ utils.uniq = function uniq(obj) {
  */
 
 utils.fromCompact = function fromCompact(compact) {
-  var exponent = compact >> 24;
-  var negative = (compact >> 23) & 0x01;
-  var mantissa = compact & 0x007fffff;
+  var exponent = compact >>> 24;
+  var negative = (compact >>> 23) & 1;
+  var mantissa = compact & 0x7fffff;
   var num;
 
   if (compact === 0)
     return new bn(0);
 
+  // Logic ported from btcd since
+  // the bitcoind code is a nightmare.
   if (exponent <= 3) {
-    mantissa >>= 8 * (3 - exponent);
+    mantissa >>>= 8 * (3 - exponent);
     num = new bn(mantissa);
   } else {
     num = new bn(mantissa);
@@ -1127,6 +1129,9 @@ utils.toCompact = function toCompact(num) {
     return 0;
 
   exponent = num.byteLength();
+
+  // Logic ported from btcd since
+  // the bitcoind code is a nightmare.
   if (exponent <= 3) {
     mantissa = num.toNumber();
     mantissa <<= 8 * (3 - exponent);
@@ -1134,7 +1139,7 @@ utils.toCompact = function toCompact(num) {
     mantissa = num.ushrn(8 * (exponent - 3)).toNumber();
   }
 
-  if (mantissa & 0x00800000) {
+  if (mantissa & 0x800000) {
     mantissa >>= 8;
     exponent++;
   }
@@ -1142,7 +1147,10 @@ utils.toCompact = function toCompact(num) {
   compact = (exponent << 24) | mantissa;
 
   if (num.isNeg())
-    compact |= 0x00800000;
+    compact |= 0x800000;
+
+  if (compact < 0)
+    compact += 0x100000000;
 
   return compact;
 };