diff --git a/man/comedi_config.8 b/man/comedi_config.8
index 0cbadf3..9f16f5d 100644
--- a/man/comedi_config.8
+++ b/man/comedi_config.8
@@ -52,13 +52,13 @@ the file \fBdrivers.txt\fR.
 .BI "--read-buffer " "num"
 set read buffer size to
 .I num
-kilobytes.  The default size is 16k.
+kilobytes.  The default size is 64k.
 
 .TP
 .BI "--write-buffer " "num"
 set write buffer size to
 .I num
-kilobytes.  The default size is 16k.
+kilobytes.  The default size is 64k.
 
 .TP
 .BI "-i, --init-data, --init-data0 " "file"