diff --git a/test/MC/Disassembler/ARM/invalid-LDRD-arm.txt b/test/MC/Disassembler/ARM/invalid-LDRD-arm.txt
new file mode 100644
index 00000000000..f8f23ed02b8
--- /dev/null
+++ b/test/MC/Disassembler/ARM/invalid-LDRD-arm.txt
@@ -0,0 +1,10 @@
+# RUN: llvm-mc --disassemble %s -triple=arm-apple-darwin9 |& grep {invalid instruction encoding}
+
+#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0 
+# -------------------------------------------------------------------------------------------------
+# | 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 0: 0| X: X: X: 1| X: X: X: X| 1: 1: X: 1| X: X: X: X|
+# -------------------------------------------------------------------------------------------------
+# 
+# A8.6.68 LDRD (register)
+# if Rt{0} = 1 then UNDEFINED;
+0xd0 0x10 0x00 0x00