diff --git a/third_party/civetweb/src/civetweb.c b/third_party/civetweb/src/civetweb.c
index fb3b965bd6a..bb3ef29d7e4 100644
--- a/third_party/civetweb/src/civetweb.c
+++ b/third_party/civetweb/src/civetweb.c
@@ -823,6 +823,7 @@ typedef unsigned short int in_port_t;
 #include <sys/poll.h>
 #include <sys/socket.h>
 #include <sys/time.h>
+#include <sys/types.h>
 #include <sys/utsname.h>
 #include <sys/wait.h>
 #include <time.h>