diff --git a/implement/elm-time/ElmTime/ProcessStore.cs b/implement/elm-time/ElmTime/ProcessStore.cs
index 939be53b..a4740b6d 100644
--- a/implement/elm-time/ElmTime/ProcessStore.cs
+++ b/implement/elm-time/ElmTime/ProcessStore.cs
@@ -135,7 +135,7 @@ public IEnumerable<byte[]> EnumerateSerializedCompositionsRecordsReverse() =>
                 https://github.com/elm-time/elm-time/blob/1cd3f00bdf5a05e9bda479c534b0458b2496393c/implement/PersistentProcess/PersistentProcess.Common/ProcessStore.cs#L183
                 Looking at the files from stores in production, it seems like that caused addition of BOM.
                 */
-                fileContent.Value[..3].Span.SequenceEqual(new byte[] { 0xEF, 0xBB, 0xBF })
+                fileContent.Value.Span.StartsWith(new byte[] { 0xEF, 0xBB, 0xBF })
                 ?
                 3
                 :
diff --git a/implement/elm-time/Platform/WebService/ProcessStoreSupportingMigrations/ProcessStoreSupportingMigrations.cs b/implement/elm-time/Platform/WebService/ProcessStoreSupportingMigrations/ProcessStoreSupportingMigrations.cs
index 732fa0f9..0af86b08 100644
--- a/implement/elm-time/Platform/WebService/ProcessStoreSupportingMigrations/ProcessStoreSupportingMigrations.cs
+++ b/implement/elm-time/Platform/WebService/ProcessStoreSupportingMigrations/ProcessStoreSupportingMigrations.cs
@@ -313,7 +313,7 @@ public ProcessStoreReaderInFileStore(IFileStoreReader fileStore)
                 https://github.com/elm-time/elm-time/blob/1cd3f00bdf5a05e9bda479c534b0458b2496393c/implement/PersistentProcess/PersistentProcess.Common/ProcessStore.cs#L183
                 Looking at the files from stores in production, it seems like that caused addition of BOM.
                 */
-                fileContent.Value[..3].Span.SequenceEqual(new byte[] { 0xEF, 0xBB, 0xBF })
+                fileContent.Value.Span.StartsWith(new byte[] { 0xEF, 0xBB, 0xBF })
                 ?
                 3
                 :