diff --git a/pipelined/testbench/testbench.sv b/pipelined/testbench/testbench.sv
index 4ebd3778..b40fcf36 100644
--- a/pipelined/testbench/testbench.sv
+++ b/pipelined/testbench/testbench.sv
@@ -373,6 +373,7 @@ module riscvassertions;
     assert (`IMEM == `MEM_CACHE | `VIRTMEM_SUPPORTED ==0) else $error("Virtual memory needs icache");
     //assert (`DMEM == `MEM_CACHE | `DBUS ==0) else $error("Dcache rquires DBUS.");
     //assert (`IMEM == `MEM_CACHE | `IBUS ==0) else $error("Icache rquires IBUS.");    
+    assert (`DCACHE_LINELENINBITS <= `XLEN*16 | (`DMEM != `MEM_CACHE)) else $error("DCACHE_LINELENINBITS must not exceed 16 words because max AHB burst size is 16");
   end
 endmodule