diff --git a/doc/man1/openssl-dsaparam.pod.in b/doc/man1/openssl-dsaparam.pod.in
index 62d443145757a..0152e4e0832bc 100644
--- a/doc/man1/openssl-dsaparam.pod.in
+++ b/doc/man1/openssl-dsaparam.pod.in
@@ -53,15 +53,16 @@ This is compatible with RFC 2459 B<DSS-Parms> structure.
 
 =item B<-in> I<filename>
 
-This specifies the input filename to read parameters from or standard input if
+This specifies the input file to read parameters from or standard input if
 this option is not specified. If the I<numbits> parameter is included then
 this option will be ignored.
 
 =item B<-out> I<filename>
 
-This specifies the output filename parameters to. Standard output is used
-if this option is not present. The output filename should B<not> be the same
-as the input filename.
+This specifies the output file to write parameters to. Standard output is used
+if this option is not present.
+The output filename can be the same as the input filename,
+which leads to replacing the file contents in situ.
 
 =item B<-noout>