diff --git a/book/insnformats.tex b/book/insnformats.tex
index a1169c7..40cdc8e 100644
--- a/book/insnformats.tex
+++ b/book/insnformats.tex
@@ -297,6 +297,8 @@
 	% add some hint bits in for imm fields
 	\draw {[rounded corners=\SignBoxCornerRadius] (1.35, -.6) -- (1.35, .6) -- (.65, .6) -- (.65, -.6) -- cycle};	% sign bit
 	\draw (32-7-.5, -.75) -- (32-7-.5, .1);		% imm[11]
+	\draw (32-30-.5, -.75) -- (32-30.5, .1);	% imm[12]
+
 	\end{scope}
 
 	\DrawHexMarkersRel{\numchars}
@@ -362,6 +364,7 @@
 	\draw {[rounded corners=\SignBoxCornerRadius] (1.35, .15) -- (1.35, 1.35) -- (.65, 1.35) -- (.65, .15) -- cycle};	% sign bit
 	\draw (32-19-.5, 0) -- (32-19.5, .85);		% imm[19:12]
 	\draw (32-20-.5, 0) -- (32-20.5, .85);		% imm[11]
+	\draw (32-30-.5, 0) -- (32-30.5, .85);		% imm[1:10]
 	\DrawHexMarkersRel{\numchars}
 }