---
 doc/gdb.texinfo |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/doc/gdb.texinfo
+++ b/doc/gdb.texinfo
@@ -6178,9 +6178,11 @@ Variables}).
 @cindex listing machine instructions
 @item disassemble
 @itemx disassemble /m
+@itemx disassemble /r
 This specialized command dumps a range of memory as machine
 instructions.  It can also print mixed source+disassembly by specifying
-the @code{/m} modifier.
+the @code{/m} modifier and print the instruction in hex as well as in
+symbolic form by specifying the @code{/r}.
 The default memory range is the function surrounding the
 program counter of the selected frame.  A single argument to this
 command is a program counter value; @value{GDBN} dumps the function