diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index 7df36746afb..a794fa723ec 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -674,11 +674,11 @@ Availability: Windows.
 \versionadded{1.5.2}
 \end{funcdesc}
 
-\begin{datadesc}{_P_WAIT}
-\dataline{_P_NOWAIT}
-\dataline{_P_NOWAITO}
-\dataline{_P_OVERLAY}
-\dataline{_P_DETACH}
+\begin{datadesc}{P_WAIT}
+\dataline{P_NOWAIT}
+\dataline{P_NOWAITO}
+\dataline{P_OVERLAY}
+\dataline{P_DETACH}
 Possible values for the \var{mode} parameter to \function{spawnv()}
 and \function{spawnve()}.
 Availability: Windows.