diff --git a/arch/risc-v/src/common/riscv_exception.c b/arch/risc-v/src/common/riscv_exception.c
index db27d20720..84162ed97d 100644
--- a/arch/risc-v/src/common/riscv_exception.c
+++ b/arch/risc-v/src/common/riscv_exception.c
@@ -25,7 +25,6 @@
 #include <nuttx/config.h>
 
 #include <stdint.h>
-#include <stdlib.h>
 #include <assert.h>
 #include <debug.h>
 
@@ -34,6 +33,10 @@
 
 #include "riscv_internal.h"
 
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
 static const char *g_reasons_str[RISCV_MAX_EXCEPTION + 1] =
 {
   "Instruction address misaligned",
@@ -46,7 +49,7 @@ static const char *g_reasons_str[RISCV_MAX_EXCEPTION + 1] =
   "Store/AMO access fault",
   "Environment call from U-mode",
   "Environment call from S-mode",
-  "Reserved",
+  "Environment call from H-mode",
   "Environment call from M-mode",
   "Instruction page fault",
   "Load page fault",