diff --git a/software/gr-caribouLite/grc/caribouLite_caribouLiteSource.block.yml b/software/gr-caribouLite/grc/caribouLite_caribouLiteSource.block.yml
index 3512f82..ed5058d 100644
--- a/software/gr-caribouLite/grc/caribouLite_caribouLiteSource.block.yml
+++ b/software/gr-caribouLite/grc/caribouLite_caribouLiteSource.block.yml
@@ -41,6 +41,7 @@ parameters:
   default: 900000000.0
 
 - id: provide_meta
+  label: output meta data
   dtype: enum
   options: ['True', 'False']
   hide: part
@@ -63,7 +64,7 @@ outputs:
   domain: stream
   dtype: complex
 
-- label: sync
+- label: meta
   domain: stream
   dtype: byte
   hide: ${False if str(provide_meta)=='True' else True}
diff --git a/software/gr-caribouLite/lib/caribouLiteSource_impl.cc b/software/gr-caribouLite/lib/caribouLiteSource_impl.cc
index 60dd2dd..243b328 100644
--- a/software/gr-caribouLite/lib/caribouLiteSource_impl.cc
+++ b/software/gr-caribouLite/lib/caribouLiteSource_impl.cc
@@ -57,7 +57,8 @@ namespace gr {
                                                 bool provide_meta)
                         : gr::sync_block("caribouLiteSource",
                           gr::io_signature::make(0, 0, 0),
-                          gr::io_signature::make(1 /* min outputs */, 2 /*max outputs */, sizeof(gr_complex)))
+                          gr::io_signature::make(1, 2, {sizeof(gr_complex), sizeof(uint8_t)})
+                          )
         {
             detectBoard();