diff --git a/src/IKVM.MSBuild.Tasks.Tests/IkvmFileIdentityUtilTests.cs b/src/IKVM.MSBuild.Tasks.Tests/IkvmFileIdentityUtilTests.cs
index 0aeb97c997..56a56505c4 100644
--- a/src/IKVM.MSBuild.Tasks.Tests/IkvmFileIdentityUtilTests.cs
+++ b/src/IKVM.MSBuild.Tasks.Tests/IkvmFileIdentityUtilTests.cs
@@ -21,7 +21,7 @@ public async Task CanSaveState()
 
             var f = Path.GetTempFileName();
             File.WriteAllText(f, "TEST");
-            var i = await u.GetIdentityForFileAsync(f, CancellationToken.None);
+            var i = await u.GetIdentityForFileAsync(f, null, CancellationToken.None);
 
             var x = new XElement("Test");
             await u.SaveStateXmlAsync(x);
diff --git a/src/IKVM.MSBuild.Tasks/IkvmAssemblyInfoUtil.cs b/src/IKVM.MSBuild.Tasks/IkvmAssemblyInfoUtil.cs
index b9b03ce53c..1a77da9b5d 100644
--- a/src/IKVM.MSBuild.Tasks/IkvmAssemblyInfoUtil.cs
+++ b/src/IKVM.MSBuild.Tasks/IkvmAssemblyInfoUtil.cs
@@ -165,7 +165,7 @@ public async System.Threading.Tasks.Task SaveStateXmlAsync(XElement root)
 
                     try
                     {
-                        log.LogMessage(MessageImportance.Low, "Loading assembly info from '{0}'.", path);
+                        log?.LogMessage(MessageImportance.Low, "Loading assembly info from '{0}'.", path);
                         using var fsstm = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
                         using var perdr = new PEReader(fsstm);
                         var mrdr = perdr.GetMetadataReader();
@@ -173,13 +173,13 @@ public async System.Threading.Tasks.Task SaveStateXmlAsync(XElement root)
                     }
                     catch (Exception e)
                     {
-                        log.LogWarning("Exception loading assembly info from '{0}': {1}", path, e.Message);
+                        log?.LogWarning("Exception loading assembly info from '{0}': {1}", path, e.Message);
                         return (lastWriteTimeUtc, null);
                     }
                 }
                 catch (Exception e)
                 {
-                    log.LogWarning("Exception loading assembly info from '{0}': {1}", path, e.Message);
+                    log?.LogWarning("Exception loading assembly info from '{0}': {1}", path, e.Message);
                     return (default, null);
                 }
             });
diff --git a/src/IKVM.MSBuild.Tasks/IkvmFileIdentityUtil.cs b/src/IKVM.MSBuild.Tasks/IkvmFileIdentityUtil.cs
index 979659875f..967ee1ad70 100644
--- a/src/IKVM.MSBuild.Tasks/IkvmFileIdentityUtil.cs
+++ b/src/IKVM.MSBuild.Tasks/IkvmFileIdentityUtil.cs
@@ -91,8 +91,6 @@ public async Task<string> GetIdentityForFileAsync(string path, TaskLoggingHelper
         {
             if (string.IsNullOrWhiteSpace(path))
                 throw new ArgumentException($"'{nameof(path)}' cannot be null or whitespace.", nameof(path));
-            if (log is null)
-                throw new ArgumentNullException(nameof(log));
 
             return (await cache.GetOrAdd(path, path => CreateIdentityForFileAsync(path, log, cancellationToken))).Identity;
         }