diff --git a/lib/thread.h b/lib/thread.h
index 69bb8d6..dfc51e2 100644
--- a/lib/thread.h
+++ b/lib/thread.h
@@ -23,6 +23,8 @@
 #ifndef _ZEBRA_THREAD_H
 #define _ZEBRA_THREAD_H
 
+#include <zebra.h>
+
 struct rusage_t
 {
 #ifdef HAVE_RUSAGE