diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 4680b87..292a3ed 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -472,8 +472,8 @@
     = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
 }
 
-TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() {
-  if (ClassTemplateSpecializationDecl *Spec
+TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
+  if (const ClassTemplateSpecializationDecl *Spec
         = dyn_cast<ClassTemplateSpecializationDecl>(this))
     return Spec->getSpecializationKind();