Bug#1107229: missing --keyring option for dpkg-source?

Package: dpkg-dev
Version: 1.22.19

Trying to extract a private source package (signed by my private
"office" key) dpkg-source forwarded a weird error message of sqv
1.3.0-3 about a missing --keyring option:

% dpkg-source -x fvwm3_1.1.3-1~xgo130+1.dsc  
error: the following required arguments were not provided:
  --keyring <FILE>
 
Usage: sqv --keyring <FILE> --cleartext --output <FILE> <FILE>

For more information, try '--help'.
dpkg-source: warning: cannot verify inline signature for ./fvwm3_1.1.3-1~xgo130+1.dsc: no acceptable signature found
dpkg-source: info: extracting fvwm3 in fvwm3-1.1.3
dpkg-source: info: unpacking fvwm3_1.1.3.orig.tar.gz
dpkg-source: info: unpacking fvwm3_1.1.3-1~xgo130+1.debian.tar.xz


I did not define the sqv command line, nor is there a keyring
option for dpkg-source, AFAIK. Maybe this could be improved.


Regards
Harri