diff --git a/doc/encoders.texi b/doc/encoders.texi
index 51e8d903c9..8dd709186e 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3113,7 +3113,9 @@ Place global headers in extradata instead of every keyframe.
 
 @end table
 
-@item trellis
+@item gmc
+Enable the use of global motion compensation (GMC).  Default is 0
+(disabled).
 
 @item me_quality
 Set motion estimation quality level. Possible values in decreasing order of
@@ -3168,6 +3170,9 @@ be better than any of the two specified individually. In other
 words, the resulting quality will be the worse one of the two
 effects.
 
+@item trellis
+Set rate-distortion optimal quantization.
+
 @item ssim
 Set structural similarity (SSIM) displaying method. Possible values: