diff --git a/lib/Target/PowerPC/PPCInstr64Bit.td b/lib/Target/PowerPC/PPCInstr64Bit.td
index 92a5051..5df735a 100644
--- a/lib/Target/PowerPC/PPCInstr64Bit.td
+++ b/lib/Target/PowerPC/PPCInstr64Bit.td
@@ -266,8 +266,8 @@
 }
 
 let Pattern = [(set G8RC:$rT, readcyclecounter)] in
-def MFTB8 : XFXForm_1_ext<31, 371, 268, (outs G8RC:$rT), (ins),
-                          "mftb $rT", SprMFTB>,
+def MFTB8 : XFXForm_1_ext<31, 339, 268, (outs G8RC:$rT), (ins),
+                          "mfspr $rT, 268", SprMFTB>,
             PPC970_DGroup_First, PPC970_Unit_FXU;
 
 let Defs = [X1], Uses = [X1] in
diff --git a/test/CodeGen/PowerPC/ppc64-cyclecounter.ll b/test/CodeGen/PowerPC/ppc64-cyclecounter.ll
index c1df3c7..38406ca 100644
--- a/test/CodeGen/PowerPC/ppc64-cyclecounter.ll
+++ b/test/CodeGen/PowerPC/ppc64-cyclecounter.ll
@@ -9,7 +9,7 @@
 }
 
 ; CHECK: @test1
-; CHECK: mftb
+; CHECK: mfspr 3, 268
 
 declare i64 @llvm.readcyclecounter()