diff --git a/src/ImageSharp/Formats/Qoi/QoiImageFormatDetector.cs b/src/ImageSharp/Formats/Qoi/QoiImageFormatDetector.cs
index 720e308b36..380e1a41d9 100644
--- a/src/ImageSharp/Formats/Qoi/QoiImageFormatDetector.cs
+++ b/src/ImageSharp/Formats/Qoi/QoiImageFormatDetector.cs
@@ -23,5 +23,5 @@ public class QoiImageFormatDetector : IImageFormatDetector
     }
 
     private bool IsSupportedFileFormat(ReadOnlySpan<byte> header)
-        => header.Length == this.HeaderSize && header[..4] == QoiConstants.Magic;
+        => header.Length >= this.HeaderSize && QoiConstants.Magic.SequenceEqual(header[..4]);
 }
diff --git a/tests/ImageSharp.Tests/Formats/Qoi/QoiDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Qoi/QoiDecoderTests.cs
index 9a5e0bfafd..cf432e82dd 100644
--- a/tests/ImageSharp.Tests/Formats/Qoi/QoiDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Qoi/QoiDecoderTests.cs
@@ -24,5 +24,6 @@ public class QoiDecoderTests
         ImageInfo imageInfo = Image.Identify(stream);
 
         Assert.NotNull(imageInfo);
+        Assert.Equal(imageInfo.Metadata.DecodedImageFormat, ImageSharp.Formats.Qoi.QoiFormat.Instance);
     }
 }