diff --git a/make.h b/make.h
index 94f760ed..306297cb 100644
--- a/make.h
+++ b/make.h
@@ -40,6 +40,10 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #include <signal.h>
 #include <stdio.h>
 #include <ctype.h>
+/* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs
+   unless <sys/timeb.h> has been included first.  Does every system have a
+   <sys/timeb.h>?  If any does not, configure should check for it.  */
+#include <sys/timeb.h>
 #include <time.h>
 #include <errno.h>