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Diffstat (limited to 'gr-blocks/lib/null_sink_impl.cc')
-rw-r--r--gr-blocks/lib/null_sink_impl.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/gr-blocks/lib/null_sink_impl.cc b/gr-blocks/lib/null_sink_impl.cc
index 41adeea0fd..14dd5eff24 100644
--- a/gr-blocks/lib/null_sink_impl.cc
+++ b/gr-blocks/lib/null_sink_impl.cc
@@ -39,8 +39,8 @@ namespace gr {
null_sink_impl::null_sink_impl(size_t sizeof_stream_item)
: sync_block("null_sink",
- io_signature::make(1, 1, sizeof_stream_item),
- io_signature::make(0, 0, 0))
+ io_signature::make(1, -1, sizeof_stream_item),
+ io_signature::make(0, 0, 0))
{
}