diff --git a/nemu/src/monitor/sdb/sdb.c b/nemu/src/monitor/sdb/sdb.c
index 49f3c07..6fd3055 100644
--- a/nemu/src/monitor/sdb/sdb.c
+++ b/nemu/src/monitor/sdb/sdb.c
@@ -192,7 +192,7 @@ static int cmd_x(char *args) {
   for (paddr_t paddr = addr; paddr < addr + n;
        paddr += WORD_BYTES) {
     word_t value = paddr_read(addr, WORD_BYTES);
-    printf("\e[1;34m" FMT_PADDR "\e[0m" "\t" FMT_WORD "\n", paddr, value);
+    printf("\e[1;34m" FMT_PADDR "\e[0m" "  " FMT_WORD "\n", paddr, value);
   }
   return 0;