diff --git a/doc/format.html b/doc/format.html
index b9ee003a..f634b4fd 100644
--- a/doc/format.html
+++ b/doc/format.html
@@ -946,7 +946,7 @@
 				<5>
 			</TD>
 			<TD>
-				Quantized linear predictor coefficient shift needed in bits (NOTE: this number is signed).
+				Quantized linear predictor coefficient shift needed in bits (NOTE: this number is signed two's-complement).
 			</TD>
 		</TR>
 		<TR>
@@ -954,7 +954,7 @@
 				&lt;n&gt;
 			</TD>
 			<TD>
-				Unencoded predictor coefficients (n = qlp coeff precision * lpc order).
+				Unencoded predictor coefficients (n = qlp coeff precision * lpc order) (NOTE: the coefficients are signed two's-complement).
 			</TD>
 		</TR>
 		<TR>