diff --git a/romulus_m.go b/romulus_m.go
index e86bbfe..936e632 100644
--- a/romulus_m.go
+++ b/romulus_m.go
@@ -54,7 +54,7 @@ func Decrypt(key []byte, ciphertext []byte, additionalData []byte) ([]byte, bool
 		return nil, false, errors.New("Failed to decrypt")
 	}
 
-	return plaintext, true, nil
+	return plaintext[:plaintextLen], true, nil
 }
 
 func genNonce() []byte {