build: WIFEXITED is defined in sys/wait.h

diff --git a/system.c b/system.c
index eee2f80bc6731128583eb4c2646d8a561c72dd7e..9efb15411c6f5c86d5dcef37438762bc8569bb88 100644 (file)
--- a/system.c
+++ b/system.c
@@ -31,6 +31,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <sys/wait.h>
 #include "mutt/mutt.h"
 #include "mutt.h"
 #ifdef USE_IMAP