diff --git a/src/Components/Server/src/BlazorPack/SequenceOfT.cs b/src/Components/Server/src/BlazorPack/SequenceOfT.cs
index 453d6b42e2..5fa01733dd 100644
--- a/src/Components/Server/src/BlazorPack/SequenceOfT.cs
+++ b/src/Components/Server/src/BlazorPack/SequenceOfT.cs
@@ -443,7 +443,7 @@ namespace Nerdbank.Streams
                 // If we store references, clear them to allow the objects to be GC'd.
                 if (!IsValueTypeElement)
                 {
-                    this.AvailableMemory.Span.Slice(startIndex, length).Fill(default);
+                    this.AvailableMemory.Span.Slice(startIndex, length).Clear();
                 }
             }
         }
diff --git a/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2TestBase.cs b/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2TestBase.cs
index 03b5e277ed..55ee7c635c 100644
--- a/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2TestBase.cs
+++ b/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2TestBase.cs
@@ -545,7 +545,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Core.Tests
 
             HPackHeaderWriter.BeginEncodeHeaders(_hpackEncoder, GetHeadersEnumerator(headers), payload, out var length);
             var padding = buffer.Slice(extendedHeaderLength + length, padLength);
-            padding.Fill(0);
+            padding.Clear();
 
             frame.PayloadLength = extendedHeaderLength + length + padLength;
 
diff --git a/src/Shared/Http2cat/Http2Utilities.cs b/src/Shared/Http2cat/Http2Utilities.cs
index 13a6ba4fc5..b320850eaa 100644
--- a/src/Shared/Http2cat/Http2Utilities.cs
+++ b/src/Shared/Http2cat/Http2Utilities.cs
@@ -343,7 +343,7 @@ namespace Microsoft.AspNetCore.Http2Cat
 
             HPackHeaderWriter.BeginEncodeHeaders(GetHeadersEnumerator(headers), payload, out var length);
             var padding = buffer.Slice(extendedHeaderLength + length, padLength);
-            padding.Fill(0);
+            padding.Clear();
 
             frame.PayloadLength = extendedHeaderLength + length + padLength;
 
@@ -431,7 +431,7 @@ namespace Microsoft.AspNetCore.Http2Cat
 
             HPackHeaderWriter.BeginEncodeHeaders(GetHeadersEnumerator(headers), payload, out var length);
             var padding = buffer.Slice(extendedHeaderLength + length, padLength);
-            padding.Fill(0);
+            padding.Clear();
 
             frame.PayloadLength = extendedHeaderLength + length + padLength;
 
diff --git a/src/Shared/HttpSys/RequestProcessing/NativeRequestContext.cs b/src/Shared/HttpSys/RequestProcessing/NativeRequestContext.cs
index 790b858b3b..88a078fbe2 100644
--- a/src/Shared/HttpSys/RequestProcessing/NativeRequestContext.cs
+++ b/src/Shared/HttpSys/RequestProcessing/NativeRequestContext.cs
@@ -53,7 +53,7 @@ namespace Microsoft.AspNetCore.HttpSys.Internal
                 // No size limit
                 _backingBuffer = MemoryPool<byte>.Shared.Rent(newSize);
             }
-            _backingBuffer.Memory.Span.Fill(0);// Zero the buffer
+            _backingBuffer.Memory.Span.Clear();
             _memoryHandle = _backingBuffer.Memory.Pin();
             _nativeRequest = (HttpApiTypes.HTTP_REQUEST*)((long)_memoryHandle.Pointer + _bufferAlignment);