diff --git a/src/values/akey.php b/src/values/akey.php
index 27518a7..ff2f741 100644
--- a/src/values/akey.php
+++ b/src/values/akey.php
@@ -73,11 +73,11 @@ class akey {
   static final function merge(&$array, $key, $merge): void {
     if ($array instanceof ArrayAccess) {
       $value = $array->offsetGet($key);
-      cl::merge($value, $merge);
+      $value = cl::merge($value, $merge);
       $array->offsetSet($key, $value);
     } else {
       cl::ensure_array($array);
-      cl::merge($array[$key], $merge);
+      $array[$key] = cl::merge($array[$key], $merge);
     }
   }
 
diff --git a/src/values/mprop.php b/src/values/mprop.php
index 09e9d4d..25b92ab 100644
--- a/src/values/mprop.php
+++ b/src/values/mprop.php
@@ -107,7 +107,7 @@ class mprop {
    */
   static final function merge(object $object, string $property, $array): void {
     $values = cl::with(self::get($object, $property));
-    cl::merge($values, cl::with($array));
+    $values = cl::merge($values, cl::with($array));
     self::set($object, $property, $values);
   }
 
diff --git a/src/values/oprop.php b/src/values/oprop.php
index 089f4c5..fa162f3 100644
--- a/src/values/oprop.php
+++ b/src/values/oprop.php
@@ -113,7 +113,7 @@ class oprop {
       $p = $c->getProperty($property);
       $p->setAccessible(true);
       $values = cl::with($p->getValue($object));
-      cl::merge($values, cl::with($array));
+      $values = cl::merge($values, cl::with($array));
       $p->setValue($object, $values);
     } catch (ReflectionException $e) {
       if (property_exists($object, $property)) {
@@ -121,7 +121,7 @@ class oprop {
       } else {
         $values = [];
       }
-      cl::merge($values, cl::with($array));
+      $values = cl::merge($values, cl::with($array));
       $object->$property = $values;
     }
   }