diff --git a/src/common/jsonconfig.c b/src/common/jsonconfig.c
index c2ee05cf9..98ae8a2d3 100644
--- a/src/common/jsonconfig.c
+++ b/src/common/jsonconfig.c
@@ -230,7 +230,7 @@ static const char* printJsonConfig(FFinstance* instance)
         return "Invalid JSON config format. Root value must be an object";
 
     yyjson_val* modules = yyjson_obj_get(root, "modules");
-    if (!modules) return "Property 'modules' is not found";
+    if (!modules) return NULL;
     if (!yyjson_is_arr(modules)) return "Property 'modules' must be an array of strings or objects";
 
     yyjson_val* item;