diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index a24ed5fa72..3141856871 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -11697,7 +11697,9 @@ static char *complete_span_helper(const char *line, const char *word, int pos, i
 
 	for (which = span = 0; span < NUM_SPANS; span++) {
 		if (pris[span].pri && ++which > state) {
-			asprintf(&ret, "%d", span + 1);	/* user indexes start from 1 */
+			if (asprintf(&ret, "%d", span + 1) < 0) {	/* user indexes start from 1 */
+				ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
+			}
 			break;
 		}
 	}