--- stack/stack.h	2003/08/04 14:13:16	1.24
+++ stack/stack.h	2003/08/08 14:20:49	1.25
@@ -41,6 +41,8 @@
 #include <sysexits.h>
 /* assert */
 #include <assert.h>
+/* waitpid */
+#include <sys/wait.h>
 
 #ifdef __linux__
 /* mtrace, muntrace */