--- atc/log.c
+++ atc/log.c
@@ -54,6 +54,7 @@
 #endif
 #endif /* not lint */
 
+#include <time.h>
 #include "include.h"
 #include "pathnames.h"
 
--- atc/main.c
+++ atc/main.c
@@ -59,6 +59,7 @@
 #endif
 #endif /* not lint */
 
+#include <time.h>
 #include "include.h"
 #include "pathnames.h"