diff --git a/include/lighttpd/settings.h b/include/lighttpd/settings.h
index 1c3b927..b54ce09 100644
--- a/include/lighttpd/settings.h
+++ b/include/lighttpd/settings.h
@@ -85,6 +85,7 @@
 #include <stdio.h>
 #include <dirent.h>
 #include <unistd.h>
+#include <wait.h>
 
 #if defined(LIGHTY_OS_LINUX)
 # include <sched.h>