diff --git a/source/utilities.tex b/source/utilities.tex
index 02e3e7b7a6..88aeb6138c 100644
--- a/source/utilities.tex
+++ b/source/utilities.tex
@@ -284,7 +284,7 @@
 
 \pnum
 \effects
-Exchanges values stored in two locations.
+Exchanges the values of \tcode{a} and \tcode{b}.
 
 \pnum
 \remarks