diff --git a/lib/fluent/plugin/out_s3.rb b/lib/fluent/plugin/out_s3.rb
index 71f14c6..b04ee6c 100644
--- a/lib/fluent/plugin/out_s3.rb
+++ b/lib/fluent/plugin/out_s3.rb
@@ -388,7 +388,11 @@ def write(chunk)
           end
         end
       ensure
-        tmp.close(true) rescue nil
+        begin
+          tmp.close(true)
+        rescue => e
+          log.info "out_s3: Tempfile#close caused unexpected error", error: e
+        end
       end
     end