diff --git a/binutils/objdump.c b/binutils/objdump.c
index 67824053527..4076587151c 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -2167,6 +2167,7 @@ objdump_color_for_disassembler_style (enum disassembler_style style)
 	{
 	case dis_style_symbol: color = 32; break;
         case dis_style_assembler_directive:
+	case dis_style_sub_mnemonic:
 	case dis_style_mnemonic: color = 33; break;
 	case dis_style_register: color = 34; break;
 	case dis_style_address:
@@ -2185,6 +2186,7 @@ objdump_color_for_disassembler_style (enum disassembler_style style)
 	{
 	case dis_style_symbol: color = 40; break;
         case dis_style_assembler_directive:
+	case dis_style_sub_mnemonic:
 	case dis_style_mnemonic: color = 142; break;
 	case dis_style_register: color = 27; break;
 	case dis_style_address:
diff --git a/include/dis-asm.h b/include/dis-asm.h
index 4f91df12498..f1a83dc84e5 100644
--- a/include/dis-asm.h
+++ b/include/dis-asm.h
@@ -62,6 +62,13 @@ enum disassembler_style
      instructions.  */
   dis_style_mnemonic,
 
+  /* Some architectures include additional mnemonic like fields within the
+     instruction operands, e.g. on aarch64 'add w16, w7, w1, lsl #2' where
+     the 'lsl' is an additional piece of text that describes how the
+     instruction should behave.  This sub-mnemonic style can be used for
+     these pieces of text.  */
+  dis_style_sub_mnemonic,
+
   /* For things that aren't real machine instructions, but rather
      assembler directives, e.g. .byte, etc.  */
   dis_style_assembler_directive,