1 files changed, 4 insertions, 4 deletions
diff --git a/PriorityQueue.cs b/PriorityQueue.cs
index d708f58..9dc2346 100755
--- a/PriorityQueue.cs
+++ b/PriorityQueue.cs
@@ -67,20 +67,20 @@ namespace PriorityQueue
             return sig;
         }
 
-        protected bool IsMoreSignificant(U that, U other) =>
-            that.CompareTo(other) * (IsMin ? -1 : 1) > 0;
+        protected int CompareKey(U that, U other) =>
+            that.CompareTo(other) * (IsMin ? -1 : 1);
 
         public void ChangeKey(int id, U key)
         {
             int index = Location[id];
 
             // key <= Array[index].Key
-            if (!IsMoreSignificant(key, Array[index].Key))
+            if (CompareKey(key, Array[index].Key) < 0)
                 throw new System.ArgumentException($"New key ({key}) is less significant than node {id}'s current key ({Array[index].Key}).");
 
             Array[index].Key = key;
 
-            while (index > 0 && IsMoreSignificant(Array[index], Array[Parent(index)]))
+            while (index > 0 && CompareKey(Array[index], Array[Parent(index)]) > 0)
             {
                 Swap(index, Parent(index));
                 index = Parent(index);