diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 4ca96dd..fc26b52 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -528,11 +528,14 @@
     return RISCV_EXCP_ILLEGAL_INST;
 }
 
-static RISCVException smepmp(CPURISCVState *env, int csrno)
+static RISCVException have_mseccfg(CPURISCVState *env, int csrno)
 {
     if (riscv_cpu_cfg(env)->ext_smepmp) {
         return RISCV_EXCP_NONE;
     }
+    if (riscv_cpu_cfg(env)->ext_zkr) {
+        return RISCV_EXCP_NONE;
+    }
 
     return RISCV_EXCP_ILLEGAL_INST;
 }
@@ -4766,7 +4769,7 @@
     [CSR_VSIPH]       = { "vsiph",       aia_hmode32, NULL, NULL, rmw_vsiph },
 
     /* Physical Memory Protection */
-    [CSR_MSECCFG]    = { "mseccfg", smepmp, read_mseccfg, write_mseccfg,
+    [CSR_MSECCFG]    = { "mseccfg",   have_mseccfg, read_mseccfg, write_mseccfg,
                          .min_priv_ver = PRIV_VERSION_1_11_0           },
     [CSR_PMPCFG0]    = { "pmpcfg0",   pmp, read_pmpcfg,  write_pmpcfg  },
     [CSR_PMPCFG1]    = { "pmpcfg1",   pmp, read_pmpcfg,  write_pmpcfg  },