1 files changed, 1 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Collections/CompatibleComparer.cs b/src/mscorlib/src/System/Collections/CompatibleComparer.cs
index 85e6c3f0f3..e5d3961245 100644
--- a/src/mscorlib/src/System/Collections/CompatibleComparer.cs
+++ b/src/mscorlib/src/System/Collections/CompatibleComparer.cs
@@ -39,7 +39,7 @@ namespace System.Collections {
 
         public int GetHashCode(Object obj) {
             if( obj == null) {
-                throw new ArgumentNullException("obj");
+                throw new ArgumentNullException(nameof(obj));
             }
             Contract.EndContractBlock();