diff --git a/nemu/src/cpu/cpu-exec.c b/nemu/src/cpu/cpu-exec.c
index 84d87b4..5651c22 100644
--- a/nemu/src/cpu/cpu-exec.c
+++ b/nemu/src/cpu/cpu-exec.c
@@ -39,7 +39,7 @@ static void trace_and_difftest(Decode *_this, vaddr_t dnpc) {
   if (g_print_step) { IFDEF(CONFIG_ITRACE, puts(_this->logbuf)); }
   IFDEF(CONFIG_DIFFTEST, difftest_step(_this->pc, dnpc));
 
-#ifdef CONFIG_WATCHPOINT
+#ifdef CONFIG_CONFIG_WATCHPOINT
   bool wp_check_hit(void);
   if (wp_check_hit()) {
     printf("watchpoint hit\n");