diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
index 703977463814..22c30b033124 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -3208,6 +3208,7 @@ def : InstAlias<"mtpid $Rx", (MTSPR 48, gprc:$Rx)>, Requires<[IsBookE]>;
 def : InstAlias<"mfpid $Rx", (MFSPR gprc:$Rx, 48)>, Requires<[IsBookE]>;
 
 def : InstAlias<"mftb $Rx", (MFTB gprc:$Rx, 268)>;
+def : InstAlias<"mftbl $Rx", (MFTB gprc:$Rx, 268)>;
 def : InstAlias<"mftbu $Rx", (MFTB gprc:$Rx, 269)>;
 
 def : InstAlias<"xnop", (XORI R0, R0, 0)>;
diff --git a/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s b/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
index 16ae65b9ea62..aee65c6fc201 100644
--- a/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
+++ b/llvm/test/MC/PowerPC/ppc64-encoding-bookII.s
@@ -106,6 +106,9 @@
 # CHECK-BE: mftb 2, 268                     # encoding: [0x7c,0x4c,0x42,0xe6]
 # CHECK-LE: mftb 2, 268                     # encoding: [0xe6,0x42,0x4c,0x7c]
             mftb 2
+# CHECK-BE: mftb 2, 268                     # encoding: [0x7c,0x4c,0x42,0xe6]
+# CHECK-LE: mftb 2, 268                     # encoding: [0xe6,0x42,0x4c,0x7c]
+            mftbl 2
 # CHECK-BE: mftb 2, 269                     # encoding: [0x7c,0x4d,0x42,0xe6]
 # CHECK-LE: mftb 2, 269                     # encoding: [0xe6,0x42,0x4d,0x7c]
             mftbu 2