diff --git a/tools/driver/cc1as_main.cpp b/tools/driver/cc1as_main.cpp
index 7dd54bd..5502a35 100644
--- a/tools/driver/cc1as_main.cpp
+++ b/tools/driver/cc1as_main.cpp
@@ -329,7 +329,7 @@
     MCAsmBackend *MAB = 0;
     if (Opts.ShowEncoding) {
       CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
-      MAB = TheTarget->createMCAsmBackend(Opts.Triple);
+      MAB = TheTarget->createMCAsmBackend(Opts.Triple, Opts.CPU);
     }
     Str.reset(TheTarget->createAsmStreamer(Ctx, *Out, /*asmverbose*/true,
                                            /*useLoc*/ true,
@@ -343,7 +343,7 @@
     assert(Opts.OutputType == AssemblerInvocation::FT_Obj &&
            "Invalid file type!");
     MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
-    MCAsmBackend *MAB = TheTarget->createMCAsmBackend(Opts.Triple);
+    MCAsmBackend *MAB = TheTarget->createMCAsmBackend(Opts.Triple, Opts.CPU);
     Str.reset(TheTarget->createMCObjectStreamer(Opts.Triple, Ctx, *MAB, *Out,
                                                 CE, Opts.RelaxAll,
                                                 Opts.NoExecStack));