diff --git a/drivers/sound/sound.c b/drivers/sound/sound.c
index 041dfdccfe..c0fc50c99d 100644
--- a/drivers/sound/sound.c
+++ b/drivers/sound/sound.c
@@ -15,7 +15,10 @@ void sound_create_square_wave(uint sample_rate, unsigned short *data, int size,
 	const int period = freq ? sample_rate / freq : 0;
 	const int half = period / 2;
 
-	assert(freq);
+	if (!half) {
+		memset(data, 0, size);
+		return;
+	}
 
 	/* Make sure we don't overflow our buffer */
 	if (size % 2)