diff --git a/system/Validation/StrictRules/Rules.php b/system/Validation/StrictRules/Rules.php
index 7043646c1f58..10fdeaaed997 100644
--- a/system/Validation/StrictRules/Rules.php
+++ b/system/Validation/StrictRules/Rules.php
@@ -63,6 +63,10 @@ public function equals($str, string $val): bool
      */
     public function exact_length($str, string $val): bool
     {
+        if (is_int($str)) {
+            $str = (string) $str;
+        }
+
         if (! is_string($str)) {
             return false;
         }