diff --git a/glossary.tex b/glossary.tex
index f990795102f4875328e4f41255ccd59d1da40216..4f9b9577e3fb20dd20fd4d25aa770a6022cac61f 100644
--- a/glossary.tex
+++ b/glossary.tex
@@ -1141,7 +1141,7 @@ Set the darker die to `\dicef{6}' and roll the other.  If this roll fails, it fa
   description={is the universal way to measure time in \glsentrytext{fenestra}, where one \glsentrytext{cycle} equals sixty days, and, and one sixth of a year},
   name={Gnomish Machine Time (GMT)},
   prefix={a\space},
-  parent={fenestra},
+  parent={cosmology},
   type={main},
 ]{gmt}{GMT}{Gnomish Machine Time}