diff --git a/nemu/src/monitor/sdb/addrexp.y b/nemu/src/monitor/sdb/addrexp.y
index af6f475..6f0d0df 100644
--- a/nemu/src/monitor/sdb/addrexp.y
+++ b/nemu/src/monitor/sdb/addrexp.y
@@ -44,7 +44,7 @@ expression
     | '-' number { $$ = -$2; }
     | '*' expression {
       printf("deref: %u\n", $2);
-      // $$ = vaddr_read($2, WORD_BYTES);
+      $$ = vaddr_read($2, WORD_BYTES);
     }
     | '(' expression ')' { $$ = $2; }