diff --git a/yeeshell.h b/yeeshell.h
index 698baec..a5907d6 100644
--- a/yeeshell.h
+++ b/yeeshell.h
@@ -41,6 +41,10 @@ const char *cputimenames[] = {"user", "ipc", "kernelcall"};
 #define TC_BUFFER 1024
 #define TC_STRINGS 200
 
+#define _ENDPOINT_P(e) ((((e) + 1023) % (1023 + ((endpoint_t)0x8ace) + 1)) - 1023)
+unsigned int nr_procs, nr_tasks;
+#define SLOT_NR(e) (_ENDPOINT_P(e) + nr_tasks)
+
 struct proc
 {
     int p_flags;