diff --git a/applications/lofar2/libraries/sdp/src/vhdl/node_sdp_adc_input_and_timing.vhd b/applications/lofar2/libraries/sdp/src/vhdl/node_sdp_adc_input_and_timing.vhd
index f38182ca78c3f78bb68b963f1010f8822675c8a3..5b110bfb743ac919ebcbfabb9466f16cb0b9a54e 100644
--- a/applications/lofar2/libraries/sdp/src/vhdl/node_sdp_adc_input_and_timing.vhd
+++ b/applications/lofar2/libraries/sdp/src/vhdl/node_sdp_adc_input_and_timing.vhd
@@ -172,7 +172,7 @@ BEGIN
     
     u_jesd204b: ENTITY tech_jesd204b_lib.tech_jesd204b 
     GENERIC MAP(
-      g_sim                => g_sim,               
+      g_sim                => FALSE, -- do not use g_sim, because JESD204B IP does support mm_clk in sim
       g_nof_streams        => c_sdp_S_pn,
       g_nof_sync_n         => c_sdp_N_sync_jesd,
       g_jesd_freq          => c_sdp_jesd204b_freq