diff --git a/applications/lofar2/libraries/sdp/tb/vhdl/tb_sdp_pkg.vhd b/applications/lofar2/libraries/sdp/tb/vhdl/tb_sdp_pkg.vhd
index ff1823f32a6a1c6548be0944cc9ba1a5e1cf5bcf..d905af1d81408584d7240267628053baee46f4a5 100644
--- a/applications/lofar2/libraries/sdp/tb/vhdl/tb_sdp_pkg.vhd
+++ b/applications/lofar2/libraries/sdp/tb/vhdl/tb_sdp_pkg.vhd
@@ -117,6 +117,7 @@ PACKAGE BODY tb_sdp_pkg IS
 
 
   FUNCTION func_sdp_verify_cep_header(in_hdr, exp_hdr : t_sdp_cep_header) RETURN BOOLEAN IS
+    VARIABLE v_beamlet_index : NATURAL;
   BEGIN
     -- eth header
     ASSERT in_hdr.eth.dst_mac        = exp_hdr.eth.dst_mac  REPORT "Wrong beamlet eth.dst_mac"  SEVERITY ERROR;
@@ -160,7 +161,9 @@ PACKAGE BODY tb_sdp_pkg IS
 
     ASSERT in_hdr.app.sdp_reserved               = exp_hdr.app.sdp_reserved               REPORT "Wrong beamlet app.sdp_reserved"               SEVERITY ERROR;
     ASSERT in_hdr.app.sdp_beamlet_scale          = exp_hdr.app.sdp_beamlet_scale          REPORT "Wrong beamlet app.sdp_beamlet_scale"          SEVERITY ERROR;
-    ASSERT in_hdr.app.sdp_beamlet_index          = exp_hdr.app.sdp_beamlet_index          REPORT "Wrong beamlet app.sdp_beamlet_index"          SEVERITY ERROR;
+    -- Treat beamlet_index modulo c_sdp_S_sub_bf, because the beamlet packets from different beamsets may arrive in arbitrary order
+    v_beamlet_index := TO_UINT(in_hdr.app.sdp_beamlet_index) MOD c_sdp_S_sub_bf;
+    ASSERT v_beamlet_index               = TO_UINT(exp_hdr.app.sdp_beamlet_index)         REPORT "Wrong beamlet app.sdp_beamlet_index"          SEVERITY ERROR;
     ASSERT in_hdr.app.sdp_nof_blocks_per_packet  = exp_hdr.app.sdp_nof_blocks_per_packet  REPORT "Wrong beamlet app.sdp_nof_blocks_per_packet"  SEVERITY ERROR;
     ASSERT in_hdr.app.sdp_nof_beamlets_per_block = exp_hdr.app.sdp_nof_beamlets_per_block REPORT "Wrong beamlet app.sdp_nof_beamlets_per_block" SEVERITY ERROR;
     ASSERT in_hdr.app.sdp_block_period           = exp_hdr.app.sdp_block_period           REPORT "Wrong beamlet app.sdp_block_period"           SEVERITY ERROR;