diff --git a/auto_log/autolog.h b/auto_log/autolog.h
index 7deec0a..f94ad1b 100644
--- a/auto_log/autolog.h
+++ b/auto_log/autolog.h
@@ -21,6 +21,7 @@
 #include <stdlib.h>
 #include <vector>
 #include <glog/logging.h>
+#include <numeric>
 
 
 class AutoLogger {