diff --git a/src/libFLAC/stream_encoder.c b/src/libFLAC/stream_encoder.c
index 6380ce6..e92d2dd 100644
--- a/src/libFLAC/stream_encoder.c
+++ b/src/libFLAC/stream_encoder.c
@@ -3537,7 +3537,7 @@ FLAC__bool process_subframe_(
 								if(encoder->protected_->do_qlp_coeff_prec_search) {
 									min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
 									/* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */
-									if(subframe_bps <= 16) {
+									if(subframe_bps <= 17) { /* +1 bit for mid-side coding */
 										max_qlp_coeff_precision = flac_min(32 - subframe_bps - FLAC__bitmath_ilog2(lpc_order), FLAC__MAX_QLP_COEFF_PRECISION);
 										max_qlp_coeff_precision = flac_max(max_qlp_coeff_precision, min_qlp_coeff_precision);
 									}
@@ -3780,7 +3780,7 @@ unsigned evaluate_lpc_subframe_(
 	const unsigned residual_samples = blocksize - order;
 
 	/* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */
-	if(subframe_bps <= 16) {
+	if(subframe_bps <= 17) { /* +1 bit for mid-side coding */
 		FLAC__ASSERT(order > 0);
 		FLAC__ASSERT(order <= FLAC__MAX_LPC_ORDER);
 		qlp_coeff_precision = flac_min(qlp_coeff_precision, 32 - subframe_bps - FLAC__bitmath_ilog2(order));