diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 686496bee6..0742c3010a 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -14631,7 +14631,7 @@ static char *sip_show_user(struct ast_cli_entry *e, int cmd, struct ast_cli_args
 
 static char *sip_show_sched(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 {
-	char cbuf[2256];
+	struct ast_str *cbuf;
 	struct ast_cb_names cbnames = {9, { "retrans_pkt",
                                         "__sip_autodestruct",
                                         "expire_register",
@@ -14661,9 +14661,13 @@ static char *sip_show_sched(struct ast_cli_entry *e, int cmd, struct ast_cli_arg
 	case CLI_GENERATE:
 		return NULL;
 	}
+
+	cbuf = ast_str_alloca(2048);
+
 	ast_cli(a->fd, "\n");
-	ast_sched_report(sched, cbuf, sizeof(cbuf), &cbnames);
-	ast_cli(a->fd, "%s", cbuf);
+	ast_sched_report(sched, &cbuf, &cbnames);
+	ast_cli(a->fd, "%s", cbuf->str);
+
 	return CLI_SUCCESS;
 }
 
diff --git a/include/asterisk/sched.h b/include/asterisk/sched.h
index f9e1ca5d2d..564453ae29 100644
--- a/include/asterisk/sched.h
+++ b/include/asterisk/sched.h
@@ -147,13 +147,12 @@ void sched_context_destroy(struct sched_context *c);
 typedef int (*ast_sched_cb)(const void *data);
 #define AST_SCHED_CB(a) ((ast_sched_cb)(a))
 
-struct ast_cb_names
-{
+struct ast_cb_names {
 	int numassocs;
 	char *list[10];
 	ast_sched_cb cblist[10];
 };
-char *ast_sched_report(struct sched_context *con, char *buf, int bufsiz, struct ast_cb_names *cbnames);
+void ast_sched_report(struct sched_context *con, struct ast_str **buf, struct ast_cb_names *cbnames);
 		
 /*! \brief Adds a scheduled event
  * Schedule an event to take place at some point in the future.  callback
diff --git a/main/sched.c b/main/sched.c
index 8b69814a3f..e6fe0549f2 100644
--- a/main/sched.c
+++ b/main/sched.c
@@ -528,41 +528,34 @@ int _ast_sched_del(struct sched_context *con, int id, const char *file, int line
 	return 0;
 }
 
-
-char *ast_sched_report(struct sched_context *con, char *buf, int bufsiz, struct ast_cb_names *cbnames)
+void ast_sched_report(struct sched_context *con, struct ast_str **buf, struct ast_cb_names *cbnames)
 {
-	int *countlist,i;
+	int i;
 	struct sched *cur;
-	char buf2[1200];
-	ast_sched_cb xxx = NULL;
-	
-	buf[0] = 0;
-	sprintf(buf, " Highwater = %d\n schedcnt = %d\n", con->highwater, con->schedcnt);
-	countlist = ast_calloc(sizeof(int),cbnames->numassocs+1);
+	int countlist[cbnames->numassocs + 1];
 	
+	ast_str_set(buf, 0, " Highwater = %d\n schedcnt = %d\n", con->highwater, con->schedcnt);
+
 	AST_DLLIST_TRAVERSE(&con->schedq, cur, list) {
 		/* match the callback to the cblist */
-		for (i=0;i<cbnames->numassocs;i++) {
-			if (cur->callback == cbnames->cblist[i])
+		for (i = 0; i < cbnames->numassocs; i++) {
+			if (cur->callback == cbnames->cblist[i]) {
 				break;
+			}
 		}
-		if (i < cbnames->numassocs)
+		if (i < cbnames->numassocs) {
 			countlist[i]++;
-		else {
-			xxx = cur->callback;
+		} else {
 			countlist[cbnames->numassocs]++;
 		}
 	}
-	for (i=0;i<cbnames->numassocs;i++) {
-		sprintf(buf2,"    %s : %d\n", cbnames->list[i], countlist[i]);
-		strcat(buf, buf2);
-	}
-	sprintf(buf2,"   <unknown:%p> : %d\n", xxx, countlist[cbnames->numassocs]);
-	strcat( buf, buf2);
-	return buf;
-}
 
+	for (i = 0; i < cbnames->numassocs; i++) {
+		ast_str_append(buf, 0, "    %s : %d\n", cbnames->list[i], countlist[i]);
+	}
 
+	ast_str_append(buf, 0, "   <unknown> : %d\n", countlist[cbnames->numassocs]);
+}
 	
 /*! \brief Dump the contents of the scheduler to LOG_DEBUG */
 void ast_sched_dump(const struct sched_context *con)