diff --git a/src/protocols/rdp/channels/rdpsnd/rdpsnd-messages.c b/src/protocols/rdp/channels/rdpsnd/rdpsnd-messages.c
index 2256fb27..1aeb8df9 100644
--- a/src/protocols/rdp/channels/rdpsnd/rdpsnd-messages.c
+++ b/src/protocols/rdp/channels/rdpsnd/rdpsnd-messages.c
@@ -297,7 +297,7 @@ void guac_rdpsnd_wave_info_handler(guac_rdp_common_svc* svc,
 
     /* Reset audio stream if format has changed */
     if (audio != NULL) {
-        if (format < sizeof(rdpsnd->formats)) 
+        if (format < GUAC_RDP_MAX_FORMATS)
             guac_audio_stream_reset(audio, NULL,
                     rdpsnd->formats[format].rate,
                     rdpsnd->formats[format].channels,