diff --git a/phpstan.neon b/phpstan.neon
index 71e5eef..2ea78e5 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -17,11 +17,6 @@ parameters:
 		    count: 1
 		    path: src/Collection/Stream/Collectors.php
 
-		-
-		    message: "#Unreachable statement - code above always terminates.#"
-		    count: 1
-		    path: src/Collection/Iterator.php
-
 		-
 		    message: "#Template type T of method#"
 		    count: 6
diff --git a/src/Collection/Iterator.php b/src/Collection/Iterator.php
index 8d87257..2b03633 100644
--- a/src/Collection/Iterator.php
+++ b/src/Collection/Iterator.php
@@ -72,6 +72,9 @@ public static function fromIterable(iterable $elements): self
         return new ArrayIterator($elements);
     }
 
+    /**
+     * @phpstan-impure
+     */
     public function hasNext(): bool
     {
         return !$this->current->isEmpty();
@@ -140,7 +143,7 @@ public function reduce(callable $operation)
         }
 
         $accumulator = $this->next();
-        while ($this->hasNext()) { // @phpstan-ignore-line
+        while ($this->hasNext()) {
             $accumulator = $operation($accumulator, $this->next());
         }