diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index b65daa5..22a9ead 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -979,7 +979,7 @@
 
 void CXXRecordDecl::getCaptureFields(
        llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
-       FieldDecl *&ThisCapture) {
+       FieldDecl *&ThisCapture) const {
   Captures.clear();
   ThisCapture = 0;