diff --git a/lib/searpc-utils.h b/lib/searpc-utils.h
index 141aa68..467e69b 100644
--- a/lib/searpc-utils.h
+++ b/lib/searpc-utils.h
@@ -66,7 +66,7 @@ inline static const json_t *json_array_get_json_or_null_element (json_t *array,
 inline static void json_array_add_json_or_null_element (json_t *array, const json_t *value)
 {
     if (value) {
-        json_t *obj = json_deep_copy(value);
+        json_t *obj = json_deep_copy((json_t*)value);
         json_array_append_new (array, obj);
     } else {
         json_array_append_new (array, json_null ());
diff --git a/tests/searpc.c b/tests/searpc.c
index a293f15..a1610d4 100644
--- a/tests/searpc.c
+++ b/tests/searpc.c
@@ -336,6 +336,15 @@ test_searpc__json_return_type (void)
     json_decref(result);
 }
 
+// The macro `json_object_foreach` is not defined in older versions of
+// libjansson.
+#ifndef json_object_foreach
+#define json_object_foreach(object, key, value) \
+    for(key = json_object_iter_key(json_object_iter(object)); \
+        key && (value = json_object_iter_value(json_object_key_to_iter(key))); \
+        key = json_object_iter_key(json_object_iter_next(object, json_object_key_to_iter(key))))
+#endif
+
 json_t *
 count_json_kvs (const json_t *obj, GError **error)
 {