diff --git a/src/LinkDotNet.StringBuilder/ValueStringBuilder.EnsureCapacity.cs b/src/LinkDotNet.StringBuilder/ValueStringBuilder.EnsureCapacity.cs
index f8c0c4a..a4779d4 100644
--- a/src/LinkDotNet.StringBuilder/ValueStringBuilder.EnsureCapacity.cs
+++ b/src/LinkDotNet.StringBuilder/ValueStringBuilder.EnsureCapacity.cs
@@ -16,7 +16,7 @@ public ref partial struct ValueStringBuilder
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public void EnsureCapacity(int newCapacity)
     {
-        if (Length >= newCapacity)
+        if (Capacity >= newCapacity)
         {
             return;
         }
@@ -54,4 +54,4 @@ private static int FindSmallestPowerOf2Above(int minimum)
     {
         return 1 << (int)Math.Ceiling(Math.Log2(minimum));
     }
-}
\ No newline at end of file
+}