diff --git a/src/SmartFormat/ZString/ZCharArray.cs b/src/SmartFormat/ZString/ZCharArray.cs
index 2406a956..92279ce5 100644
--- a/src/SmartFormat/ZString/ZCharArray.cs
+++ b/src/SmartFormat/ZString/ZCharArray.cs
@@ -120,7 +120,7 @@ private void Grow(int length)
     {
         var newArray = Pool.Rent(length);
         Array.Copy(_bufferArray!, newArray, Math.Min(_bufferArray!.Length, length));
-        Pool.Return(_bufferArray);
+        Pool.Return(_bufferArray, clearArray: true);
         _bufferArray = newArray;
     }
 
@@ -271,7 +271,7 @@ public void Dispose()
     {
         if (IsDisposed) return;
 
-        Pool.Return(_bufferArray!);
+        Pool.Return(_bufferArray!, clearArray: true);
         _bufferArray = null;
     }
 }