diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index 2ddcd76..9738784 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -592,9 +592,12 @@
   void jmp(Label* label);
   void jmp(NearLabel* label);
 
+  void repne_scasb();
   void repne_scasw();
+  void repe_cmpsb();
   void repe_cmpsw();
   void repe_cmpsl();
+  void rep_movsb();
   void rep_movsw();
 
   X86Assembler* lock();