diff --git a/disassembler/disassembler_x86.cc b/disassembler/disassembler_x86.cc
index 68e77d4..1b96a2b 100644
--- a/disassembler/disassembler_x86.cc
+++ b/disassembler/disassembler_x86.cc
@@ -735,7 +735,7 @@
   std::ostringstream args;
   if (reg_in_opcode) {
     DCHECK(!has_modrm);
-    DumpReg(args, rex, *instr & 0x7, false, prefix[2], GPR);
+    DumpBaseReg(args, rex, *instr & 0x7);
   }
   instr++;
   uint32_t address_bits = 0;