diff --git a/src/libraries/System.Private.CoreLib/src/System/IO/Directory.cs b/src/libraries/System.Private.CoreLib/src/System/IO/Directory.cs
index 50f649bebbfbcd..78715de118e537 100644
--- a/src/libraries/System.Private.CoreLib/src/System/IO/Directory.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/IO/Directory.cs
@@ -197,18 +197,19 @@ internal static IEnumerable<string> InternalEnumeratePaths(
             string path,
             string searchPattern,
             SearchTarget searchTarget,
-            EnumerationOptions options)
+            EnumerationOptions enumerationOptions)
         {
             ArgumentNullException.ThrowIfNull(path);
             ArgumentNullException.ThrowIfNull(searchPattern);
+            ArgumentNullException.ThrowIfNull(enumerationOptions);
 
-            FileSystemEnumerableFactory.NormalizeInputs(ref path, ref searchPattern, options.MatchType);
+            FileSystemEnumerableFactory.NormalizeInputs(ref path, ref searchPattern, enumerationOptions.MatchType);
 
             return searchTarget switch
             {
-                SearchTarget.Files => FileSystemEnumerableFactory.UserFiles(path, searchPattern, options),
-                SearchTarget.Directories => FileSystemEnumerableFactory.UserDirectories(path, searchPattern, options),
-                SearchTarget.Both => FileSystemEnumerableFactory.UserEntries(path, searchPattern, options),
+                SearchTarget.Files => FileSystemEnumerableFactory.UserFiles(path, searchPattern, enumerationOptions),
+                SearchTarget.Directories => FileSystemEnumerableFactory.UserDirectories(path, searchPattern, enumerationOptions),
+                SearchTarget.Both => FileSystemEnumerableFactory.UserEntries(path, searchPattern, enumerationOptions),
                 _ => throw new ArgumentOutOfRangeException(nameof(searchTarget)),
             };
         }
diff --git a/src/libraries/System.Private.CoreLib/src/System/IO/DirectoryInfo.cs b/src/libraries/System.Private.CoreLib/src/System/IO/DirectoryInfo.cs
index 2f46635df51b6e..835ab22793730c 100644
--- a/src/libraries/System.Private.CoreLib/src/System/IO/DirectoryInfo.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/IO/DirectoryInfo.cs
@@ -183,19 +183,20 @@ private IEnumerable<FileSystemInfo> InternalEnumerateInfos(
             string path,
             string searchPattern,
             SearchTarget searchTarget,
-            EnumerationOptions options)
+            EnumerationOptions enumerationOptions)
         {
             ArgumentNullException.ThrowIfNull(searchPattern);
+            ArgumentNullException.ThrowIfNull(enumerationOptions);
 
             Debug.Assert(path != null);
 
-            _isNormalized &= FileSystemEnumerableFactory.NormalizeInputs(ref path, ref searchPattern, options.MatchType);
+            _isNormalized &= FileSystemEnumerableFactory.NormalizeInputs(ref path, ref searchPattern, enumerationOptions.MatchType);
 
             return searchTarget switch
             {
-                SearchTarget.Directories => FileSystemEnumerableFactory.DirectoryInfos(path, searchPattern, options, _isNormalized),
-                SearchTarget.Files => FileSystemEnumerableFactory.FileInfos(path, searchPattern, options, _isNormalized),
-                SearchTarget.Both => FileSystemEnumerableFactory.FileSystemInfos(path, searchPattern, options, _isNormalized),
+                SearchTarget.Directories => FileSystemEnumerableFactory.DirectoryInfos(path, searchPattern, enumerationOptions, _isNormalized),
+                SearchTarget.Files => FileSystemEnumerableFactory.FileInfos(path, searchPattern, enumerationOptions, _isNormalized),
+                SearchTarget.Both => FileSystemEnumerableFactory.FileSystemInfos(path, searchPattern, enumerationOptions, _isNormalized),
                 _ => throw new ArgumentException(SR.ArgumentOutOfRange_Enum, nameof(searchTarget)),
             };
         }
diff --git a/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Enumeration/MatchCasingTests.cs b/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Enumeration/MatchCasingTests.cs
index 3599af19d71aaf..24c34aa021de23 100644
--- a/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Enumeration/MatchCasingTests.cs
+++ b/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Enumeration/MatchCasingTests.cs
@@ -10,6 +10,12 @@ public abstract class MatchCasingTests : FileSystemTest
     {
         protected abstract string[] GetPaths(string directory, string pattern, EnumerationOptions options);
 
+        [Fact]
+        public void EnumerationOptionsNull()
+        {
+            AssertExtensions.Throws<ArgumentNullException>("enumerationOptions", () => GetPaths(GetTestFilePath(), "file*", null));
+        }
+
         [Fact]
         public void MatchCase()
         {