diff --git a/src/target/riscv/riscv-013.c b/src/target/riscv/riscv-013.c
index c05d9fc23..d3b558e8a 100644
--- a/src/target/riscv/riscv-013.c
+++ b/src/target/riscv/riscv-013.c
@@ -2225,8 +2225,9 @@ int riscv013_test_compliance(struct target *target) {
   riscv_reg_t value;
 
   LOG_INFO("Trying to write zeroes into Debug ROM");
-  uint8_t b[100] = {};
+  uint8_t b[256] = {};
   write_memory(target, 0x800, 4, 24, b);
+  write_memory(target, 0x280, 4, 40, b);
 
   dmcontrol = set_field(dmcontrol_orig, hartsel_mask(target), RISCV_MAX_HARTS-1);
   dmi_write(target, DMI_DMCONTROL, dmcontrol);