diff --git a/source/iostreams.tex b/source/iostreams.tex
index 32baffd01c..2b22a5587b 100644
--- a/source/iostreams.tex
+++ b/source/iostreams.tex
@@ -4058,7 +4058,7 @@
 That is, for each class derived from a specialization of
 \tcode{basic_streambuf}
 in this Clause\iref{stringbuf,filebuf},
-a specification of how consuming a character effects the associated output sequence is given.
+a specification of how consuming a character affects the associated output sequence is given.
 There is no requirement on a program-defined class.
 \end{footnote}
 \item