diff --git a/arraylist.c b/arraylist.c
index 5d51a5b..bab903e 100644
--- a/arraylist.c
+++ b/arraylist.c
@@ -31,7 +31,7 @@ array_list_new(array_list_free_fn *free_fn)
 	arr->size = ARRAY_LIST_DEFAULT_SIZE;
 	arr->length = 0;
 	arr->free_fn = free_fn;
-	if(!(arr->array = (void**)calloc(sizeof(void*), arr->size))) {
+	if(!(arr->array = (void**)calloc(arr->size, sizeof(void*)))) {
 		free(arr);
 		return NULL;
 	}
diff --git a/json_object.c b/json_object.c
index 386f22e..8f79ded 100644
--- a/json_object.c
+++ b/json_object.c
@@ -214,7 +214,7 @@ static void fjson_object_generic_delete(struct fjson_object* jso)
 
 static struct fjson_object* fjson_object_new(const enum fjson_type o_type)
 {
-	struct fjson_object *const jso = (struct fjson_object*)calloc(sizeof(struct fjson_object), 1);
+	struct fjson_object *const jso = (struct fjson_object*)calloc(1, sizeof(struct fjson_object));
 	if (!jso)
 		return NULL;
 	jso->o_type = o_type;