diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index a7c81ab..383fde1 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -325,6 +325,10 @@
                                     PFS))
       return true;
   }
+  // FIXME: This is a temporary workaround until the reserved registers can be
+  // serialized.
+  MF.getRegInfo().freezeReservedRegs(MF);
+  MF.verify();
   return false;
 }