diff --git a/src/Forward.php b/src/Forward.php
index bff2161..ec44b4a 100644
--- a/src/Forward.php
+++ b/src/Forward.php
@@ -84,10 +84,9 @@ public function toStructuredField(): Parameters
     {
         return Parameters::new()
             ->append(Properties::Forward->value, $this->reason->toToken())
-            ->append(Properties::ForwardStatusCode->value, $this->statusCode)
-            ->append(Properties::Stored->value, $this->stored)
-            ->append(Properties::Collapsed->value, $this->collapsed)
-            ->filter(fn (array $pair): bool => false !== $pair[1]->value());
+            ->when(null !== $this->statusCode, fn (Parameters $parameters) => $parameters->append(Properties::ForwardStatusCode->value, $this->statusCode)) /* @phpstan-ignore-line */
+            ->when(true === $this->stored, fn (Parameters $parameters) => $parameters->append(Properties::Stored->value, $this->stored))
+            ->when(true === $this->collapsed, fn (Parameters $parameters) => $parameters->append(Properties::Collapsed->value, $this->collapsed));
     }
 
     public function equals(mixed $other): bool
diff --git a/src/HandledRequestCache.php b/src/HandledRequestCache.php
index 0e527c9..096ea35 100644
--- a/src/HandledRequestCache.php
+++ b/src/HandledRequestCache.php
@@ -136,15 +136,11 @@ private static function validator(): ItemValidator
     public function toStructuredField(): Item
     {
         return Item::new($this->servedBy)
-            ->withParameters(
-                Parameters::new()
-                    ->append(Properties::Hit->value, $this->hit)
-                    ->mergePairs($this->forward ?? [])
-                    ->append(Properties::TimeToLive->value, $this->ttl)
-                    ->append(Properties::Key->value, $this->key)
-                    ->append(Properties::Detail->value, $this->detail)
-                    ->filter(fn (array $pair): bool => false !== $pair[1]->value()),
-            );
+            ->when(true === $this->hit, fn (Item $item) => $item->appendParameter(Properties::Hit->value, $this->hit))
+            ->when(null !== $this->forward, fn (Item $item) => $item->mergeParametersByPairs($this->forward))  /* @phpstan-ignore-line */
+            ->when(null !== $this->ttl, fn (Item $item) => $item->appendParameter(Properties::TimeToLive->value, $this->ttl))  /* @phpstan-ignore-line */
+            ->when(null !== $this->key, fn (Item $item) => $item->appendParameter(Properties::Key->value, $this->key))  /* @phpstan-ignore-line */
+            ->when(null !== $this->detail, fn (Item $item) => $item->appendParameter(Properties::Detail->value, $this->detail));  /* @phpstan-ignore-line */
     }
 
     /**