diff --git a/app/models/metadata_image.rb b/app/models/metadata_image.rb
index 85ee062a..fc61a4d7 100644
--- a/app/models/metadata_image.rb
+++ b/app/models/metadata_image.rb
@@ -5,7 +5,7 @@ class MetadataImage < MetadataFile
   def validate
     super
 
-    errors << I18n.t('metadata.image.not_an_image') unless path? && image?
+    errors << I18n.t('metadata.image.not_an_image') if path? && !image?
 
     errors.compact!
     errors.empty?