diff --git a/libraries/base/diag/src/vhdl/diag_pkg.vhd b/libraries/base/diag/src/vhdl/diag_pkg.vhd
index 9758197ca6366db3ed31ad3c2b7a709034378934..810a4777d65faeb2600919e4818738d8ebcf63d5 100644
--- a/libraries/base/diag/src/vhdl/diag_pkg.vhd
+++ b/libraries/base/diag/src/vhdl/diag_pkg.vhd
@@ -112,7 +112,8 @@ PACKAGE diag_pkg IS
   CONSTANT c_diag_bg_samples_per_packet_w : NATURAL := 24;   
   CONSTANT c_diag_bg_blocks_per_sync_w    : NATURAL := 24;   
   CONSTANT c_diag_bg_gapsize_w            : NATURAL := 31;
-  CONSTANT c_diag_bg_mem_adrs_w           : NATURAL := 24;  
+  CONSTANT c_diag_bg_gapsize_max          : NATURAL := c_natural_high;  -- = 2147483647 = 2**31 - 1 = NATURAL'HIGH
+  CONSTANT c_diag_bg_mem_adrs_w           : NATURAL := 24;
   CONSTANT c_diag_bg_mem_low_adrs_w       : NATURAL := c_diag_bg_mem_adrs_w;  
   CONSTANT c_diag_bg_mem_high_adrs_w      : NATURAL := c_diag_bg_mem_adrs_w;
   CONSTANT c_diag_bg_mem_max_adr          : NATURAL := 2**c_diag_bg_mem_adrs_w-1;