diff --git a/lib/CodeGen/CGCXXABI.cpp b/lib/CodeGen/CGCXXABI.cpp
index 32393bb..aba5d75 100644
--- a/lib/CodeGen/CGCXXABI.cpp
+++ b/lib/CodeGen/CGCXXABI.cpp
@@ -23,7 +23,7 @@
                                 StringRef S) {
   DiagnosticsEngine &Diags = CGF.CGM.getDiags();
   unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
-                                          "cannot yet compile %1 in this ABI");
+                                          "cannot yet compile %0 in this ABI");
   Diags.Report(CGF.getContext().getFullLoc(CGF.CurCodeDecl->getLocation()),
                DiagID)
     << S;