diff a/src/hotspot/cpu/x86/macroAssembler_x86.hpp b/src/hotspot/cpu/x86/macroAssembler_x86.hpp
--- a/src/hotspot/cpu/x86/macroAssembler_x86.hpp
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.hpp
@@ -954,10 +954,13 @@
   void aesctr_encrypt(Register src_addr, Register dest_addr, Register key, Register counter,
                       Register len_reg, Register used, Register used_addr, Register saved_encCounter_start);
 
 #endif
 
+  void fast_md5(Register buf, Address state, Address ofs, Address limit,
+                bool multi_block);
+
   void fast_sha1(XMMRegister abcd, XMMRegister e0, XMMRegister e1, XMMRegister msg0,
                  XMMRegister msg1, XMMRegister msg2, XMMRegister msg3, XMMRegister shuf_mask,
                  Register buf, Register state, Register ofs, Register limit, Register rsp,
                  bool multi_block);