diff --git a/src/Compilers/CSharp/Portable/Symbols/FileIdentifier.cs b/src/Compilers/CSharp/Portable/Symbols/FileIdentifier.cs
index 85e3302c000ae..2ad6757a501d0 100644
--- a/src/Compilers/CSharp/Portable/Symbols/FileIdentifier.cs
+++ b/src/Compilers/CSharp/Portable/Symbols/FileIdentifier.cs
@@ -3,13 +3,13 @@
 // See the LICENSE file in the project root for more information.
 
 using System.Collections.Immutable;
-using System.Security.Cryptography;
 using System.Text;
 using Microsoft.CodeAnalysis.CSharp.Symbols;
+using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.CSharp;
 
-internal struct FileIdentifier
+internal readonly struct FileIdentifier
 {
     private static readonly Encoding s_encoding = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true);
 
@@ -27,8 +27,8 @@ public static FileIdentifier Create(string filePath)
         try
         {
             var encodedFilePath = s_encoding.GetBytes(filePath);
-            using var sha256 = SHA256.Create();
-            hash = sha256.ComputeHash(encodedFilePath).ToImmutableArray();
+            using var hashAlgorithm = SourceHashAlgorithms.CreateDefaultInstance();
+            hash = hashAlgorithm.ComputeHash(encodedFilePath).ToImmutableArray();
         }
         catch (EncoderFallbackException ex)
         {
diff --git a/src/Compilers/Core/Portable/Text/SourceHashAlgorithms.cs b/src/Compilers/Core/Portable/Text/SourceHashAlgorithms.cs
index 7ca4fd3067163..eb84be4dc4aa8 100644
--- a/src/Compilers/Core/Portable/Text/SourceHashAlgorithms.cs
+++ b/src/Compilers/Core/Portable/Text/SourceHashAlgorithms.cs
@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using System.Security.Cryptography;
 using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.Text
@@ -44,5 +45,20 @@ public static SourceHashAlgorithm GetSourceHashAlgorithm(Guid guid)
             => (guid == s_guidSha256) ? SourceHashAlgorithm.Sha256 :
                (guid == s_guidSha1) ? SourceHashAlgorithm.Sha1 :
                SourceHashAlgorithm.None;
+
+        private static HashAlgorithm CreateInstance(SourceHashAlgorithm algorithm)
+        {
+            return algorithm switch
+            {
+                SourceHashAlgorithm.Sha1 => SHA1.Create(),
+                SourceHashAlgorithm.Sha256 => SHA256.Create(),
+                _ => throw ExceptionUtilities.UnexpectedValue(algorithm)
+            };
+        }
+
+        public static HashAlgorithm CreateDefaultInstance()
+        {
+            return CreateInstance(Default);
+        }
     }
 }