diff --git a/sched/misc/assert.c b/sched/misc/assert.c
index 847b7460f6..a1d09353be 100644
--- a/sched/misc/assert.c
+++ b/sched/misc/assert.c
@@ -70,7 +70,7 @@
  * Private Data
  ****************************************************************************/
 
-static uintptr_t g_last_regs[XCPTCONTEXT_REGS] aligned_data(16);
+static uint8_t g_last_regs[XCPTCONTEXT_SIZE] aligned_data(16);
 
 #ifdef CONFIG_BOARD_COREDUMP
 static struct lib_syslogstream_s  g_syslogstream;