diff --git a/app/services/uninterlace_service.rb b/app/services/uninterlace_service.rb
index d4cef3aaf..0ec100e38 100644
--- a/app/services/uninterlace_service.rb
+++ b/app/services/uninterlace_service.rb
@@ -17,6 +17,7 @@ class UninterlaceService
   end
 
   def interlaced?(png_path)
+    return false if png_path.blank?
     png = MiniMagick::Image.open(png_path)
     png.data["interlace"] != "None"
   end