diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 1f717519270..04eaa863e7c 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,7 @@
+2020-01-20  Alan Modra  <amodra@gmail.com>
+
+	* arm-dis.c (print_insn_arm): Wrap 'T' value.
+
 2020-01-18  Nick Clifton  <nickc@redhat.com>
 
 	* configure: Regenerate.
diff --git a/opcodes/arm-dis.c b/opcodes/arm-dis.c
index c986b5897ed..be2a93253bb 100644
--- a/opcodes/arm-dis.c
+++ b/opcodes/arm-dis.c
@@ -10106,7 +10106,7 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
 			  case 'T':
 			    /* We want register + 1 when decoding T.  */
 			    if (*c == 'T')
-			      ++value;
+			      value = (value + 1) & 0xf;
 
 			    if (c[1] == 'u')
 			      {