diff --git a/src/server.h b/src/server.h
index 4522ea8b8..f48039e46 100644
--- a/src/server.h
+++ b/src/server.h
@@ -42,6 +42,7 @@
 #include <stdlib.h>
 #include <cmath>
 #include <string.h>
+#include <string>
 #include <time.h>
 #include <limits.h>
 #include <unistd.h>