diff --git a/lib/Artwork.php b/lib/Artwork.php
index 2533bad6..dc159742 100644
--- a/lib/Artwork.php
+++ b/lib/Artwork.php
@@ -509,8 +509,8 @@ class Artwork{
 			}
 		}
 
-		if($this->MimeType === null && !$error->Has('Exceptions\InvalidImageUploadException')){
-			// Only notify of wrong mimetype if there is no other problem with the uploaded image
+		if($imagePath !== null && $this->MimeType === null && !$error->Has('Exceptions\InvalidImageUploadException')){
+			// Only notify of wrong mimetype if there are no other problem with the uploaded image
 			$error->Add(new Exceptions\InvalidMimeTypeException());
 		}
 
diff --git a/www/artworks/post.php b/www/artworks/post.php
index 98897d5f..13c30abb 100644
--- a/www/artworks/post.php
+++ b/www/artworks/post.php
@@ -68,6 +68,10 @@ try{
 			$artwork->Status = $newStatus;
 		}
 
+		if(HttpInput::File('artwork-image') === null){
+			$artwork->MimeType = $originalArtwork->MimeType;
+		}
+
 		$artwork->Save(HttpInput::File('artwork-image'));
 
 		$_SESSION['artwork'] = $artwork;