diff --git a/difftest/difftest-def.h b/difftest/difftest-def.h
index 366560b64..b8964281a 100644
--- a/difftest/difftest-def.h
+++ b/difftest/difftest-def.h
@@ -84,6 +84,7 @@
     "_zicbom_zicboz" \
     "_sstc" \
     "_smrnmi_smdbltrp_ssdbltrp" \
+    "_smmpm_smnpm_ssnpm" \
 
 #define CONFIG_MEMORY_SIZE     (16 * 1024 * 1024 * 1024UL)
 #define CONFIG_FLASH_BASE      0x10000000UL