diff --git a/MimeTypeMap.cs b/MimeTypeMap.cs
index 88d08f2..424390f 100644
--- a/MimeTypeMap.cs
+++ b/MimeTypeMap.cs
@@ -700,6 +700,7 @@ private static IDictionary<string, string> BuildMappings()
                 {"audio/x-smd", ".smd"},
                 {"image/bmp", ".bmp"},
                 {"image/jpeg", ".jpg"},
+                {"image/jpg", ".jpg"},
                 {"image/pict", ".pic"},
                 {"image/png", ".png"}, // Defined in [RFC-2045], [RFC-2048]
                 {"image/x-png", ".png"}, // See https://www.w3.org/TR/PNG/#A-Media-type :"It is recommended that implementations also recognize the media type "image/x-png"."