diff --git a/include/monotonic.h b/include/monotonic.h
index aca8b1fe4..bbebfe0b9 100644
--- a/include/monotonic.h
+++ b/include/monotonic.h
@@ -4,6 +4,9 @@
 /*
  * Uses clock_gettime() that requires $CLOCKGETTIME_LIBS
  */
+#include <signal.h>
+#include <sys/time.h>
+
 extern int get_boot_time(struct timeval *boot_time);
 
 extern int gettime_monotonic(struct timeval *tv);