diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index 80d27173a5b7..896f53f94a54 100644
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -728,10 +728,11 @@ a prefix; rather, all combinations of its values are stripped:
 \end{methoddesc}
 
 \begin{methoddesc}[string]{partition}{sep}
-Splits the string at the \var{sep}, and return a 3-tuple containing
-the part before the separator, the separator itself, and the part
-after the separator.  If the separator is not found, return a 3-tuple
-containing the string itself, followed by two empty strings.
+Splits the string at the first occurence of \var{sep}, and return
+a 3-tuple containing the part before the separator, the separator
+itself, and the part after the separator.  If the separator is not
+found, return a 3-tuple containing the string itself, followed by
+two empty strings.
 \versionadded{2.5}
 \end{methoddesc}