--- asterisk-1.6.2.7.orig/res/res_agi.c	2010-03-25 15:21:51.000000000 +0000
+++ asterisk-1.6.2.7/res/res_agi.c	2010-05-25 17:13:46.000000000 +0000
@@ -2937,8 +2937,8 @@
 
 			if (!buf[0]) {
 				/* Program terminated */
-				if (returnstatus) {
-					returnstatus = -1;
+				if (returnstatus != AGI_RESULT_HANGUP && returnstatus != AGI_RESULT_SUCCESS) {
+					returnstatus = AGI_RESULT_FAILURE;
 				}
 				ast_verb(3, "<%s>AGI Script %s completed, returning %d\n", chan->name, request, returnstatus);
 				if (pid > 0)