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-rw-r--r--gnuradio-core/src/lib/io/ppio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/io/ppio.h b/gnuradio-core/src/lib/io/ppio.h
index da5ba70ce..e1a62e2a3 100644
--- a/gnuradio-core/src/lib/io/ppio.h
+++ b/gnuradio-core/src/lib/io/ppio.h
@@ -31,6 +31,7 @@ typedef boost::shared_ptr<ppio> ppio_sptr;
/*!
* \brief abstract class that provides low level access to parallel port bits
+ * \ingroup hardware
*/
class ppio {