diff --git a/lib/bcoin/mempool.js b/lib/bcoin/mempool.js
index efa14849..a8fdaeae 100644
--- a/lib/bcoin/mempool.js
+++ b/lib/bcoin/mempool.js
@@ -1865,8 +1865,8 @@ MempoolEntry.fromRaw = function fromRaw(data) {
 MempoolEntry.prototype.getPriority = function getPriority(height) {
   var heightDelta = height - this.height;
   var modSize = this.tx.getModifiedSize(this.size);
-  var deltaPriority = heightDelta * this.chainValue / modSize;
-  var result = this.priority + deltaPriority;
+  var deltaPriority = (heightDelta * this.chainValue) / modSize;
+  var result = this.priority + Math.floor(deltaPriority);
   if (result < 0)
     result = 0;
   return result;
diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index e0ec171c..55160cf6 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -1450,7 +1450,7 @@ TX.prototype.getPriority = function getPriority(height, size) {
 
   return {
     value: value,
-    priority: sum / size
+    priority: Math.floor(sum / size)
   };
 };