diff --git a/lib/imap-flow.js b/lib/imap-flow.js
index a79064c..9c8a7d0 100644
--- a/lib/imap-flow.js
+++ b/lib/imap-flow.js
@@ -2586,7 +2586,7 @@ class ImapFlow extends EventEmitter {
             let filename = disposition.params.filename || contentType.params.name || false;
             if (filename) {
                 try {
-                    filename = this.libmime.decodeWords(filename);
+                    filename = libmime.decodeWords(filename);
                 } catch (err) {
                     // failed to parse filename, keep as is (most probably an unknown charset is used)
                 }
@@ -2780,7 +2780,7 @@ class ImapFlow extends EventEmitter {
                 let filename = disposition.params.filename || contentType.params.name || false;
                 if (filename) {
                     try {
-                        filename = this.libmime.decodeWords(filename);
+                        filename = libmime.decodeWords(filename);
                     } catch (err) {
                         // failed to parse filename, keep as is (most probably an unknown charset is used)
                     }