diff --git a/src/library/compiler/closed_term_cache.cpp b/src/library/compiler/closed_term_cache.cpp
index a7cbb5f8e8..0faca833d6 100644
--- a/src/library/compiler/closed_term_cache.cpp
+++ b/src/library/compiler/closed_term_cache.cpp
@@ -56,7 +56,7 @@ struct ct_cache_modification : public modification {
 };
 
 optional<name> get_closed_term_name(environment const & env, expr const & e) {
-    lean_assert(!has_fvars(e));
+    lean_assert(!has_fvar(e));
     lean_assert(!has_loose_bvars(e));
     closed_term_ext const & ext = get_extension(env);
     if (name const * c = ext.m_cache.find(e)) {
diff --git a/src/library/compiler/llnf.cpp b/src/library/compiler/llnf.cpp
index 62fc58978b..42f5b5216e 100644
--- a/src/library/compiler/llnf.cpp
+++ b/src/library/compiler/llnf.cpp
@@ -1238,7 +1238,6 @@ class explicit_boxing_fn {
         lean_assert(is_constant(f));
         name const & fn = const_name(f);
         if (is_cases_on_recursor(env(), fn)) {
-            lean_assert(!is_let_val);
             return visit_cases(f, args);
         } else if (is_llnf_closure(f)) {
             return visit_closure(f, args);