diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1449,7 +1449,7 @@
                                  Fn.getSubprogram(),
                                  &Fn.getEntryBlock());
       R << "FastISel didn't lower all arguments: "
-        << ore::NV("Prototype", Fn.getType());
+        << ore::NV("Prototype", Fn.getFunctionType());
       reportFastISelFailure(*MF, *ORE, R, EnableFastISelAbort > 1);
 
       // Use SelectionDAG argument lowering