diff -uNr pt-1.2.1-orig/lc-switch.h pt-1.2.1-rsk/lc-switch.h
--- pt-1.2.1-orig/lc-switch.h	2005-04-01 03:08:25.000000000 -0600
+++ pt-1.2.1-rsk/lc-switch.h	2006-01-23 13:29:42.000000000 -0600
@@ -63,9 +63,13 @@
 /** \hideinitializer */
 typedef unsigned short lc_t;
 
+#define LC_TERM_MARKER 0xffff
+
+#define LC_TERM(s) s = LC_TERM_MARKER;
+
 #define LC_INIT(s) s = 0;
 
-#define LC_RESUME(s) switch(s) { case 0:
+#define LC_RESUME(s) switch(s) { case LC_TERM_MARKER: break; case 0:
 
 #define LC_SET(s) s = __LINE__; case __LINE__: 
 
diff -uNr pt-1.2.1-orig/pt.h pt-1.2.1-rsk/pt.h
--- pt-1.2.1-orig/pt.h	2005-10-06 02:56:35.000000000 -0500
+++ pt-1.2.1-rsk/pt.h	2006-01-23 13:32:15.000000000 -0600
@@ -113,6 +113,11 @@
  */
 #define PT_INIT(pt)   LC_INIT((pt)->lc)
 
+/*
+ * XXX: Document -- rsk
+ */
+#define PT_TERM(pt)   LC_TERM((pt)->lc)
+
 /**
  * Declare the start of a protothread inside the C function
  * implementing the protothread.
@@ -303,6 +308,7 @@
 #define PT_EXIT(pt)				\
   do {						\
     PT_INIT(pt);				\
+    PT_TERM(pt);				\
     return PT_THREAD_EXITED;			\
   } while(0)