diff --git a/system/system_monitor/include/system_monitor/mem_monitor/mem_monitor.hpp b/system/system_monitor/include/system_monitor/mem_monitor/mem_monitor.hpp
index c8e79372c6c30..4dbb35fba85f2 100644
--- a/system/system_monitor/include/system_monitor/mem_monitor/mem_monitor.hpp
+++ b/system/system_monitor/include/system_monitor/mem_monitor/mem_monitor.hpp
@@ -24,6 +24,7 @@
 
 #include <boost/process.hpp>
 
+#include <unordered_map>
 #include <climits>
 #include <map>
 #include <string>