diff --git a/include/dbus-sdr/sdrutils.hpp b/include/dbus-sdr/sdrutils.hpp
index 7a001a6..b78e226 100644
--- a/include/dbus-sdr/sdrutils.hpp
+++ b/include/dbus-sdr/sdrutils.hpp
@@ -367,7 +367,7 @@
 
 namespace ipmi
 {
-std::map<std::string, std::vector<std::string>>
+std::optional<std::map<std::string, std::vector<std::string>>>
     getObjectInterfaces(const char* path);
 
 std::map<std::string, Value> getEntityManagerProperties(const char* path,