diff --git a/include/csptr/smart_ptr.h b/include/csptr/smart_ptr.h
index 8087b99..e8c9cf2 100644
--- a/include/csptr/smart_ptr.h
+++ b/include/csptr/smart_ptr.h
@@ -70,7 +70,7 @@ CSPTR_INLINE void sfree_stack(void *ptr) {
     ({                                                                      \
         struct s_tmp {                                                      \
             CSPTR_SENTINEL_DEC                                              \
-            __typeof__(__typeof__(Type)[Length]) value;                     \
+            __typeof__(Type) *value;                                        \
             f_destructor dtor;                                              \
             struct {                                                        \
                 const void *ptr;                                            \
@@ -81,8 +81,12 @@ CSPTR_INLINE void sfree_stack(void *ptr) {
             __VA_ARGS__                                                     \
         };                                                                  \
         void *var = smalloc(sizeof (Type), Length, Kind, ARGS_);            \
-        if (var != NULL)                                                    \
-            memcpy(var, &args.value, sizeof (Type));                        \
+        if (var != NULL) {                                                  \
+            if (args.value != NULL)                                         \
+                memcpy(var, args.value, sizeof (Type) * Length);            \
+            else                                                            \
+                memset(var, 0, sizeof(Type) * Length);                      \
+        }                                                                   \
         var;                                                                \
     })
 
diff --git a/src/mman.c b/src/mman.c
index 5df136c..ad6c3e8 100644
--- a/src/mman.c
+++ b/src/mman.c
@@ -136,7 +136,7 @@ CSPTR_INLINE static void dealloc_entry(s_meta *meta, void *ptr) {
         if (meta->kind & ARRAY) {
             s_meta_array *arr_meta = (void *) (meta + 1);
             for (size_t i = 0; i < arr_meta->nmemb; ++i)
-                meta->dtor((char *) ptr + arr_meta->size * i, user_meta);
+                meta->dtor((char *) ptr + arr_meta->size * i, arr_meta + 1);
         } else
             meta->dtor(ptr, user_meta);
     }