diff --git a/C/agc.c b/C/agc.c
index fe53c4342..26603d0b4 100755
--- a/C/agc.c
+++ b/C/agc.c
@@ -322,11 +322,7 @@ mark_global(void)
    * to clean the global now that functors are just variables pointing to
    * the code 
    */
-#if COROUTINING
-  pt = (CELL *)DelayTop();
-#else
   pt = H0;
-#endif
   while (pt < H) {
     pt = mark_global_cell(pt);
   }