diff --git a/cpp2rust/cpp_rule_preprocessor.cpp b/cpp2rust/cpp_rule_preprocessor.cpp
index 51e10c48..48185130 100644
--- a/cpp2rust/cpp_rule_preprocessor.cpp
+++ b/cpp2rust/cpp_rule_preprocessor.cpp
@@ -270,6 +270,7 @@ class Callback : public clang::ast_matchers::MatchFinder::MatchCallback {
 
         clang::DefaultArguments defaultArgs;
         clang::Sema::CheckTemplateArgumentInfo ctai;
+        clang::Sema::InstantiatingTemplate Inst(*sema_, loc_, decl);
         auto invalid = sema_->CheckTemplateArgumentList(
             decl, decl->getTemplateParameters(), loc_, targsInfo, defaultArgs,
             true, ctai);