diff --git a/llvm/lib/MC/MCAssembler.cpp b/llvm/lib/MC/MCAssembler.cpp
index fdcd8c7..7a42108 100644
--- a/llvm/lib/MC/MCAssembler.cpp
+++ b/llvm/lib/MC/MCAssembler.cpp
@@ -765,7 +765,7 @@
   // Relax the fragment.
 
   MCInst Relaxed;
-  getBackend().relaxInstruction(F.getInst(), Relaxed);
+  getBackend().relaxInstruction(F.getInst(), F.getSubtargetInfo(), Relaxed);
 
   // Encode the new instruction.
   //