diff --git a/MD_STD_IN.php b/MD_STD_IN.php
index c9f1ad3..f4b555d 100644
--- a/MD_STD_IN.php
+++ b/MD_STD_IN.php
@@ -148,7 +148,7 @@ final class MD_STD_IN {
         if ($input === "") return "";
 
         $output = \filter_var($input, FILTER_SANITIZE_URL);
-        if (\filter_var($output, FILTER_VALIDATE_URL) === false) {
+        if (($output = \filter_var($output, FILTER_VALIDATE_URL)) === false) {
             throw new MDInvalidUrl("Invalid input URL");
         }
 
@@ -168,7 +168,7 @@ final class MD_STD_IN {
         if ($input === "") return "";
 
         $output = \filter_var($input, FILTER_SANITIZE_EMAIL);
-        if (\filter_var($output, FILTER_VALIDATE_EMAIL) === false) {
+        if (($output = \filter_var($output, FILTER_VALIDATE_EMAIL)) === false) {
             throw new MDInvalidEmail("Invalid input email address");
         }