diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64d88779..abdfeb77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Fixed
 
-- Some types of imports were not being detected correctly and were failing to import.
+- Some types of imports were not being detected correctly and were failing to import. #1678
 
 # [0.30.10] - 2025-08-22
 
diff --git a/app/services/photos/thumbnail.rb b/app/services/photos/thumbnail.rb
index ad2da385..c7046a2d 100644
--- a/app/services/photos/thumbnail.rb
+++ b/app/services/photos/thumbnail.rb
@@ -52,7 +52,7 @@ class Photos::Thumbnail
     request_headers
   end
 
-  unsupported_source_error unless SUPPORTED_SOURCES.include?(source)
+  def unsupported_source_error
     raise ArgumentError, "Unsupported source: #{source}"
   end
 end