diff --git a/fix16.tal b/fix16.tal
index 75e0ae3..2a9fe42 100644
--- a/fix16.tal
+++ b/fix16.tal
@@ -108,8 +108,8 @@
 %x16-two       { #0200 } (    2.0        )
 %x16-ten       { #0a00 } (   10.0        )
 %x16-hundred   { #6400 } (  100.0        )
-%x16-minus-one { #7f00 } (   -1.0        )
-%x16-minus-two { #7e00 } (   -2.0        )
+%x16-minus-one { #ff00 } (   -1.0        )
+%x16-minus-two { #fe00 } (   -2.0        )
 %x16-pi/2      { #0192 } (    1.57079... )
 %x16-pi        { #0324 } (    3.14159... )
 %x16-3pi/2     { #04b6 } (    4.71239... )