diff --git a/src/array.c b/src/array.c
index d8dbf45..d027d5d 100644
--- a/src/array.c
+++ b/src/array.c
@@ -113,7 +113,7 @@ copy(void *ptr)
 	CFWArray *new;
 	size_t i;
 
-	if ((new = cfw_new(cfw_array)) == NULL)
+	if ((new = cfw_new(cfw_array, NULL)) == NULL)
 		return NULL;
 
 	if ((new->data = malloc(sizeof(void*) * array->size)) == NULL) {
diff --git a/src/string.c b/src/string.c
index 55db71c..5c7904b 100644
--- a/src/string.c
+++ b/src/string.c
@@ -108,7 +108,7 @@ copy(void *ptr)
 	CFWString *str = ptr;
 	CFWString *new;
 
-	if ((new = cfw_new(cfw_string)) == NULL)
+	if ((new = cfw_new(cfw_string, NULL)) == NULL)
 		return NULL;
 
 	if ((new->data = malloc(str->len + 1)) == NULL) {