diff --git a/source/time.tex b/source/time.tex
index 4bcdba97b2..9670880241 100644
--- a/source/time.tex
+++ b/source/time.tex
@@ -2733,7 +2733,7 @@
 prior to assigning that difference to \tcode{tp}.
 
 \pnum
-\returns is.
+\returns \tcode{is}.
 \end{itemdescr}
 
 \rSec2[time.clock.utc]{Class \tcode{utc_clock}}
@@ -3085,7 +3085,7 @@
 \end{codeblock}
 
 \pnum
-\returns os.
+\returns \tcode{os}.
 
 \pnum
 \begin{example}
@@ -3272,7 +3272,7 @@
 \end{codeblock}
 
 \pnum
-\returns os.
+\returns \tcode{os}.
 
 \pnum
 \begin{example}