diff --git a/libraries/base/dp/src/vhdl/dp_fifo_fill_eop.vhd b/libraries/base/dp/src/vhdl/dp_fifo_fill_eop.vhd
index 381cd124bba1ff193c3423fc76e24d20af32a686..62ddba22104d5a5ff2ba355a63bbe5150b39a20e 100644
--- a/libraries/base/dp/src/vhdl/dp_fifo_fill_eop.vhd
+++ b/libraries/base/dp/src/vhdl/dp_fifo_fill_eop.vhd
@@ -97,7 +97,7 @@ ENTITY dp_fifo_fill_eop IS
     snk_out     : OUT t_dp_siso;
     snk_in      : IN  t_dp_sosi;
     -- ST source
-    src_in      : IN  t_dp_siso;
+    src_in      : IN  t_dp_siso := c_dp_siso_rdy;
     src_out     : OUT t_dp_sosi
   );
 END dp_fifo_fill_eop;
diff --git a/libraries/base/dp/src/vhdl/dp_fifo_fill_sc.vhd b/libraries/base/dp/src/vhdl/dp_fifo_fill_sc.vhd
index 6c677dc7e33bfe3a05394cd1edbce508aa8a0ced..db85d766fdeb1160ec49358fa622ac9e23bb66c8 100644
--- a/libraries/base/dp/src/vhdl/dp_fifo_fill_sc.vhd
+++ b/libraries/base/dp/src/vhdl/dp_fifo_fill_sc.vhd
@@ -68,7 +68,7 @@ ENTITY dp_fifo_fill_sc IS
     snk_out     : OUT t_dp_siso;
     snk_in      : IN  t_dp_sosi;
     -- ST source
-    src_in      : IN  t_dp_siso;
+    src_in      : IN  t_dp_siso := c_dp_siso_rdy;
     src_out     : OUT t_dp_sosi
   );
 END dp_fifo_fill_sc;
diff --git a/libraries/base/dp/src/vhdl/dp_fifo_sc.vhd b/libraries/base/dp/src/vhdl/dp_fifo_sc.vhd
index 6421ae0d6ab3d7e4f2d61501a6be75bc1170026c..fb9570775d09d98e39f905748c21ad9ea61c5feb 100644
--- a/libraries/base/dp/src/vhdl/dp_fifo_sc.vhd
+++ b/libraries/base/dp/src/vhdl/dp_fifo_sc.vhd
@@ -62,7 +62,7 @@ ENTITY dp_fifo_sc IS
     snk_out     : OUT t_dp_siso;
     snk_in      : IN  t_dp_sosi;
     -- ST source
-    src_in      : IN  t_dp_siso;
+    src_in      : IN  t_dp_siso := c_dp_siso_rdy;
     src_out     : OUT t_dp_sosi
   );
 END dp_fifo_sc;