diff --git a/src/absil/ilwritepdb.fs b/src/absil/ilwritepdb.fs
index 01248622f48..5e013cc2ba1 100644
--- a/src/absil/ilwritepdb.fs
+++ b/src/absil/ilwritepdb.fs
@@ -128,27 +128,22 @@ type idd =
 
 /// The specified Hash algorithm to use on portable pdb files.
 type HashAlgorithm =
-| Sha1
-| Sha256
+    | Sha1
+    | Sha256
 
 // Document checksum algorithms
 let guidSha1 = Guid("ff1816ec-aa5e-4d10-87f7-6f4963833460")
 let guidSha2 = Guid("8829d00f-11b8-4213-878b-770e8597ac16")
 
-// If the FIPS algorithm policy is enabled on the computer (e.g., for US government employees and contractors)
-// then obtaining the MD5 implementation in BCL will throw. 
-// In this case, catch the failure, and not set a checksum. 
 let checkSum (url: string) (checksumAlgorithm: HashAlgorithm) =
-    try
-        use file = FileSystem.FileStreamReadShim url
-        let guid, alg =
-            match checksumAlgorithm with
-            | HashAlgorithm.Sha1 -> guidSha1, System.Security.Cryptography.SHA1.Create() :> System.Security.Cryptography.HashAlgorithm
-            | HashAlgorithm.Sha256 -> guidSha2, System.Security.Cryptography.SHA256.Create() :> System.Security.Cryptography.HashAlgorithm
+    use file = FileSystem.FileStreamReadShim url
+    let guid, alg =
+        match checksumAlgorithm with
+        | HashAlgorithm.Sha1 -> guidSha1, System.Security.Cryptography.SHA1.Create() :> System.Security.Cryptography.HashAlgorithm
+        | HashAlgorithm.Sha256 -> guidSha2, System.Security.Cryptography.SHA256.Create() :> System.Security.Cryptography.HashAlgorithm
 
-        let checkSum = alg.ComputeHash file
-        Some (guid, checkSum)
-    with _ -> None
+    let checkSum = alg.ComputeHash file
+    guid, checkSum
 
 //---------------------------------------------------------------------
 // Portable PDB Writer
@@ -335,27 +330,19 @@ let generatePortablePdb (embedAllSource: bool) (embedSourceList: string list) (s
         metadata.SetCapacity(TableIndex.Document, docLength)
         for doc in docs do
             let handle =
-                match checkSum doc.File checksumAlgorithm with
-                | Some (hashAlg, checkSum) ->
-                    let dbgInfo = 
-                        (serializeDocumentName doc.File,
-                         metadata.GetOrAddGuid hashAlg,
-                         metadata.GetOrAddBlob(checkSum.ToImmutableArray()),
-                         metadata.GetOrAddGuid corSymLanguageTypeId) |> metadata.AddDocument
-                    match includeSource doc.File with
-                    | None -> ()
-                    | Some blob ->
-                        metadata.AddCustomDebugInformation(DocumentHandle.op_Implicit dbgInfo,
-                                                           metadata.GetOrAddGuid embeddedSourceId,
-                                                           metadata.GetOrAddBlob blob) |> ignore
-                    dbgInfo
-                | None ->
-                    let dbgInfo = 
-                        (serializeDocumentName doc.File,
-                         metadata.GetOrAddGuid(System.Guid.Empty),
-                         metadata.GetOrAddBlob(ImmutableArray<byte>.Empty),
-                         metadata.GetOrAddGuid corSymLanguageTypeId) |> metadata.AddDocument
-                    dbgInfo
+                let hashAlg, checkSum = checkSum doc.File checksumAlgorithm
+                let dbgInfo =
+                    (serializeDocumentName doc.File,
+                     metadata.GetOrAddGuid hashAlg,
+                     metadata.GetOrAddBlob(checkSum.ToImmutableArray()),
+                     metadata.GetOrAddGuid corSymLanguageTypeId) |> metadata.AddDocument
+                match includeSource doc.File with
+                | None -> ()
+                | Some blob ->
+                    metadata.AddCustomDebugInformation(DocumentHandle.op_Implicit dbgInfo,
+                                                       metadata.GetOrAddGuid embeddedSourceId,
+                                                       metadata.GetOrAddBlob blob) |> ignore
+                dbgInfo
             index.Add(doc.File, handle)
 
         if not (String.IsNullOrEmpty sourceLink) then
@@ -538,6 +525,7 @@ let generatePortablePdb (embedAllSource: bool) (embedSourceList: string list) (s
         match checksumAlgorithm with
         | HashAlgorithm.Sha1 -> "SHA1", System.Security.Cryptography.SHA1.Create() :> System.Security.Cryptography.HashAlgorithm
         | HashAlgorithm.Sha256 -> "SHA256", System.Security.Cryptography.SHA256.Create() :> System.Security.Cryptography.HashAlgorithm
+
     let idProvider: System.Func<IEnumerable<Blob>, BlobContentId> =
         let convert (content: IEnumerable<Blob>) =
             let contentBytes = content |> Seq.collect (fun c -> c.GetBytes()) |> Array.ofSeq
diff --git a/src/absil/ilwritepdb.fsi b/src/absil/ilwritepdb.fsi
index d96b40170e1..748e178a461 100644
--- a/src/absil/ilwritepdb.fsi
+++ b/src/absil/ilwritepdb.fsi
@@ -84,8 +84,8 @@ type idd =
       iddChunk: BinaryChunk }
 
 type HashAlgorithm =
-| Sha1
-| Sha256
+    | Sha1
+    | Sha256
 
 val generatePortablePdb : embedAllSource: bool -> embedSourceList: string list -> sourceLink: string -> checksumAlgorithm: HashAlgorithm -> showTimes: bool -> info: PdbData -> pathMap:PathMap -> (int64 * BlobContentId * MemoryStream * string * byte[])
 val compressPortablePdbStream : uncompressedLength:int64 -> contentId:BlobContentId -> stream:MemoryStream -> (int64 * BlobContentId * MemoryStream)