diff --git a/docs/latex/wx/stream.tex b/docs/latex/wx/stream.tex
index 45a146774a..9ff128a6ed 100644
--- a/docs/latex/wx/stream.tex
+++ b/docs/latex/wx/stream.tex
@@ -296,6 +296,12 @@ Flushes the IO buffer.
 
 Fill the IO buffer.
 
+\membersection{wxStreamBuffer::GetBufferSize}\label{wxstreambuffergetbuffersize}
+
+\constfunc{size\_t}{GetBufferSize}{\void}
+
+Returns the size of the buffer.
+
 \membersection{wxStreamBuffer::GetDataLeft}\label{wxstreambuffergetdataleft}
 
 \func{size\_t}{GetDataLeft}{\void}