diff --git a/spa/plugins/bluez5/backend-native.c b/spa/plugins/bluez5/backend-native.c
index ecd4c7761..908ad9fa9 100644
--- a/spa/plugins/bluez5/backend-native.c
+++ b/spa/plugins/bluez5/backend-native.c
@@ -1163,10 +1163,9 @@ next_indicator:
 			return true;
 		}
 	} else if (spa_strstartswith(buf, "AT+VTS=")) {
-		char *dtmf;
+		char dtmf[2];
 		enum cmee_error error;
 
-		dtmf = calloc(1, 2);
 		if (sscanf(buf, "AT+VTS=%1s", dtmf) != 1) {
 			spa_log_debug(backend->log, "Failed to parse AT+VTS: \"%s\"", buf);
 			rfcomm_send_error(rfcomm, CMEE_AG_FAILURE);