Use variable interpolation.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/acts_as_xapian/acts_as_xapian.rb b/lib/acts_as_xapian/acts_as_xapian.rb
index a0ced0c93..0d15fc5bd 100644
--- a/lib/acts_as_xapian/acts_as_xapian.rb
+++ b/lib/acts_as_xapian/acts_as_xapian.rb
@@ -615,7 +615,7 @@ module ActsAsXapian
         # Abort if full rebuild is going on
         new_path = ActsAsXapian.db_path + ".new"
         if File.exist?(new_path)
-            raise "aborting incremental index update while full index rebuild happens; found existing " + new_path
+            raise "aborting incremental index update while full index rebuild happens; found existing #{new_path}"
         end
 
         ActsAsXapianJob.pluck(:id).each do |id|