diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd
index f86d6521db17daf0e2c4adcab6e2671a32f0c73f..dfa55240ead64fbe9cfb32daf7284d4da4c7f3c3 100644
--- a/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd
@@ -642,7 +642,7 @@ BEGIN
     reg_data_buf_mosi => reg_diag_data_buf_mosi, --FIXME address space is wrong (1 bit)
     reg_data_buf_miso => reg_diag_data_buf_miso,
 
-    in_sync           => diag_data_buf_snk_in_arr(0).sop,
+    in_sync           => diag_data_buf_snk_in_arr(0).sync, 
     in_sosi_arr       => diag_data_buf_snk_in_arr
   );