diff --git a/rtengine/dcp.cc b/rtengine/dcp.cc
index c18ee8915..c60e80587 100644
--- a/rtengine/dcp.cc
+++ b/rtengine/dcp.cc
@@ -419,7 +419,7 @@ std::map<std::string, std::string> getAliases(const Glib::ustring& profile_dir)
     buffer[read] = 0;
 
     cJSON_Minify(buffer.get());
-    const std::unique_ptr<cJSON> root(cJSON_Parse(buffer.get()));
+    const std::unique_ptr<cJSON, decltype(&cJSON_Delete)> root(cJSON_Parse(buffer.get()), cJSON_Delete);
     if (!root || !root->child) {
         if (settings->verbose) {
             std::cout << "Could not parse 'camera_model_aliases.json' file." << std::endl;