diff --git a/src/ImageSharp/Formats/Gif/GifDecoder.cs b/src/ImageSharp/Formats/Gif/GifDecoder.cs
index c81c51e8b..ac451a355 100644
--- a/src/ImageSharp/Formats/Gif/GifDecoder.cs
+++ b/src/ImageSharp/Formats/Gif/GifDecoder.cs
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <inheritdoc/>
         public IImageInfo Identify(Configuration configuration, Stream stream)
         {
-            Guard.NotNull(stream, "stream");
+            Guard.NotNull(stream, nameof(stream));
 
             var decoder = new GifDecoderCore(configuration, this);
             return decoder.Identify(stream);
diff --git a/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs b/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
index e738982cb..eafbb391c 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegDecoder.cs
@@ -33,7 +33,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         /// <inheritdoc/>
         public IImageInfo Identify(Configuration configuration, Stream stream)
         {
-            Guard.NotNull(stream, "stream");
+            Guard.NotNull(stream, nameof(stream));
 
             using (var decoder = new PdfJsJpegDecoderCore(configuration, this))
             {