diff --git a/redfish-core/lib/trigger.hpp b/redfish-core/lib/trigger.hpp
index 210468c..bb0a0e2 100644
--- a/redfish-core/lib/trigger.hpp
+++ b/redfish-core/lib/trigger.hpp
@@ -137,7 +137,7 @@
     return std::make_optional(thresholds);
 }
 
-nlohmann::json
+inline nlohmann::json
     getMetricReportDefinitions(const std::vector<std::string>& reportNames)
 {
     nlohmann::json reports = nlohmann::json::array();