diff --git a/tests/commandtest.c b/tests/commandtest.c
index cb78a3c50a..c8053ff604 100644
--- a/tests/commandtest.c
+++ b/tests/commandtest.c
@@ -26,6 +26,7 @@
 #include <unistd.h>
 #include <signal.h>
 #include <sys/stat.h>
+#include <sys/wait.h>
 #include <fcntl.h>
 
 #include "testutils.h"