diff --git a/src/NodaValidationHelper.php b/src/NodaValidationHelper.php
index 8a090d9..8807071 100644
--- a/src/NodaValidationHelper.php
+++ b/src/NodaValidationHelper.php
@@ -40,7 +40,7 @@ final class NodaValidationHelper {
         }
 
         // Ensure the description is not just a copy-pasted version of the tag name.
-        if (empty(trim(str_replace($description, $name, ''), "#,.;:\t " . PHP_EOL))) {
+        if (empty(trim(str_replace($name, '', $description), "#,.;:\t " . PHP_EOL))) {
             throw new MDgenericInvalidInputsException("The tag description cannot be simply a fancy copy of the tag's name. Please define it.");
         }