diff --git a/src/Formatter/ArrayBasedDeformatter.php b/src/Formatter/ArrayBasedDeformatter.php
index 4337d77..f2145f3 100644
--- a/src/Formatter/ArrayBasedDeformatter.php
+++ b/src/Formatter/ArrayBasedDeformatter.php
@@ -41,6 +41,9 @@ public function deserializeInt(mixed $decoded, Field $field): int|DeformatterRes
         }
 
         // Weak mode.
+        if ($field->nullable && is_null($value)) {
+            return null;
+        }
         return (int)($decoded[$field->serializedName]);
     }
 
@@ -60,6 +63,9 @@ public function deserializeFloat(mixed $decoded, Field $field): float|Deformatte
         }
 
         // Weak mode.
+        if ($field->nullable && is_null($value)) {
+            return null;
+        }
         return (float)($decoded[$field->serializedName]);
     }
 
@@ -79,6 +85,9 @@ public function deserializeBool(mixed $decoded, Field $field): bool|DeformatterR
         }
 
         // Weak mode.
+        if ($field->nullable && is_null($value)) {
+            return null;
+        }
         return (bool)($decoded[$field->serializedName]);
     }
 
@@ -98,6 +107,9 @@ public function deserializeString(mixed $decoded, Field $field): string|Deformat
         }
 
         // Weak mode.
+        if ($field->nullable && is_null($value)) {
+            return null;
+        }
         return (string)($value);
     }
 
diff --git a/tests/ArrayFormatterTest.php b/tests/ArrayFormatterTest.php
index 82f7133..aa3b76b 100644
--- a/tests/ArrayFormatterTest.php
+++ b/tests/ArrayFormatterTest.php
@@ -5,6 +5,7 @@
 namespace Crell\Serde;
 
 use Crell\Serde\Formatter\ArrayFormatter;
+use Crell\Serde\NonStrict\NonStrictNullableProperties;
 use Crell\Serde\PropertyHandler\EnumOnArrayImporter;
 use Crell\Serde\Records\BackedSize;
 use Crell\Serde\Records\LiteralEnums;
@@ -86,6 +87,26 @@ public function literal_enums(): void
         self::assertEquals($expected, $result);
     }
 
+    #[Test]
+    public function non_strict_null_stays_null_on_nullable_fields(): void
+    {
+        $s = new SerdeCommon(formatters: $this->formatters);
+
+        $serialized = [
+            'int' => null,
+            'float' => null,
+            'string' => null,
+            'bool' => null,
+        ];
+
+        $result = $s->deserialize($serialized, from: 'array', to: NonStrictNullableProperties::class);
+
+        self::assertNull($result->int);
+        self::assertNull($result->float);
+        self::assertNull($result->string);
+        self::assertNull($result->bool);
+    }
+
     public static function non_strict_properties_examples(): iterable
     {
         foreach (self::non_strict_properties_examples_data() as $k => $v) {
diff --git a/tests/NonStrict/NonStrictNullableProperties.php b/tests/NonStrict/NonStrictNullableProperties.php
new file mode 100644
index 0000000..03a8a06
--- /dev/null
+++ b/tests/NonStrict/NonStrictNullableProperties.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Crell\Serde\NonStrict;
+
+use Crell\Serde\Attributes\Field;
+
+class NonStrictNullableProperties
+{
+    public function __construct(
+        #[Field(strict: false)]
+        public readonly ?int $int = null,
+        #[Field(strict: false)]
+        public readonly ?float $float = null,
+        #[Field(strict: false)]
+        public readonly ?string $string = null,
+        #[Field(strict: false)]
+        public readonly ?bool $bool = null,
+    ) {
+    }
+}