Index: main/autoservice.c
===================================================================
--- main/autoservice.c	(revision 162886)
+++ main/autoservice.c	(working copy)
@@ -110,6 +110,20 @@
 			continue;
 		}
 
+		for (i = 0; i < x; ) {
+			if (ast_channel_trylock(mons[i])) {
+				if (i < (x - 1)) {
+					memmove(&mons[i], &mons[i + 1], (x - (i + 1)) * sizeof(mons[0]));
+				} else {
+					++i;
+				}
+				--x;
+			} else {
+				ast_channel_unlock(mons[i]);
+				++i;
+			}
+		}
+
 		chan = ast_waitfor_n(mons, x, &ms);
 		if (!chan) {
 			continue;