diff -Nuar tevent-0.10.2.orig/tevent.h tevent-0.10.2/tevent.h
--- tevent-0.10.2.orig/tevent.h	2019-12-10 12:01:31.000000000 +0100
+++ tevent-0.10.2/tevent.h	2020-03-26 00:05:03.516072687 +0100
@@ -32,6 +32,9 @@
 #include <talloc.h>
 #include <sys/time.h>
 #include <stdbool.h>
+#ifndef pid_t
+#include <sys/types.h>
+#endif
 
 struct tevent_context;
 struct tevent_ops;