diff --git a/components/squeezelite/output_i2s.c b/components/squeezelite/output_i2s.c
index dc65d176..2f9d2e89 100644
--- a/components/squeezelite/output_i2s.c
+++ b/components/squeezelite/output_i2s.c
@@ -757,7 +757,7 @@ static void IRAM_ATTR spdif_convert(ISAMPLE_T *src, size_t frames, u32_t *dst) {
 
         if (!count--) {            
 			*dst++ = (vu << 24) | (PREAMBLE_B << 16) | 0xCCCC;
-			count = 192;
+			count = 191;
 		} else {
 			*dst++ = (vu << 24) | (PREAMBLE_M << 16) | 0xCCCC;
 		}