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diff --git a/fpga/usrp3/lib/rfnoc/axi_join.v b/fpga/usrp3/lib/rfnoc/axi_join.v
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+
+
+// Copyright 2014 Ettus Research
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+module axi_join
+  #(parameter INPUTS=2)
+  (input [INPUTS-1:0] i_tlast, input [INPUTS-1:0] i_tvalid, output [INPUTS-1:0] i_tready,
+   output o_tlast, output o_tvalid, input o_tready);
+
+   wire   all_here = &i_tvalid;
+   assign o_tvalid = all_here;
+   assign o_tlast = |i_tlast;
+   assign i_tready = {INPUTS{o_tready & all_here}};
+   
+endmodule // axi_join