diff --git a/lib/Target/Mips/MipsInstrInfo.td b/lib/Target/Mips/MipsInstrInfo.td
index cdc1bae777b..c7487000c41 100644
--- a/lib/Target/Mips/MipsInstrInfo.td
+++ b/lib/Target/Mips/MipsInstrInfo.td
@@ -262,7 +262,9 @@ def uimm20      : Operand<i32> {
 def uimm10      : Operand<i32> {
 }
 
-def simm16_64   : Operand<i64>;
+def simm16_64   : Operand<i64> {
+  let DecoderMethod = "DecodeSimm16";
+}
 
 // Unsigned Operand
 def uimm5       : Operand<i32> {
diff --git a/test/MC/Disassembler/Mips/mips64.txt b/test/MC/Disassembler/Mips/mips64.txt
index 2ccef834e87..f3d2d100cae 100644
--- a/test/MC/Disassembler/Mips/mips64.txt
+++ b/test/MC/Disassembler/Mips/mips64.txt
@@ -2,6 +2,9 @@
 # CHECK: daddiu $11, $26, 31949
 0x67 0x4b 0x7c 0xcd
 
+# CHECK: daddiu $sp, $sp, -32
+0x67 0xbd 0xff 0xe0
+
 # CHECK: daddu $26, $1, $11
 0x00 0x2b 0xd0 0x2d