diff --git a/lib/main.js b/lib/main.js
index ce7ca50e..1247a430 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -199,6 +199,10 @@ function _configDotenv (options) {
     }
     if (options.encoding != null) {
       encoding = options.encoding
+    } else {
+      if (debug) {
+        _debug('No encoding is specified. UTF-8 is used by default')
+      }
     }
   }