diff --git a/include/ChangeLog b/include/ChangeLog
index 98d4241681..a36555386e 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,7 @@
+2018-10-03  John Darrington <john@darrington.wattle.id.au>
+
+	* dis-asm.h (print_insn_s12z): New declaration.
+
 2018-10-02  Palmer Dabbelt  <palmer@sifive.com>
 
 	* opcode/riscv-opc.h (MATCH_FENCE_TSO): New define.
diff --git a/include/dis-asm.h b/include/dis-asm.h
index c46380b42c..84627950c0 100644
--- a/include/dis-asm.h
+++ b/include/dis-asm.h
@@ -277,6 +277,7 @@ typedef int (*disassembler_ftype) (bfd_vma, disassemble_info *);
 /* Disassemblers used out side of opcodes library.  */
 extern int print_insn_m32c		(bfd_vma, disassemble_info *);
 extern int print_insn_mep		(bfd_vma, disassemble_info *);
+extern int print_insn_s12z		(bfd_vma, disassemble_info *);
 extern int print_insn_sh		(bfd_vma, disassemble_info *);
 extern int print_insn_sparc		(bfd_vma, disassemble_info *);
 extern int print_insn_rx		(bfd_vma, disassemble_info *);