diff --git a/include/bitset b/include/bitset
index 55b55759..0c40b9b7 100644
--- a/include/bitset
+++ b/include/bitset
@@ -159,7 +159,7 @@ protected:
     friend class __bit_const_reference<__bitset>;
     friend class __bit_iterator<__bitset, false>;
     friend class __bit_iterator<__bitset, true>;
-    friend class __bit_array<__bitset>;
+    friend struct __bit_array<__bitset>;
 
     __storage_type __first_[_N_words];
 
@@ -435,7 +435,7 @@ protected:
     friend class __bit_const_reference<__bitset>;
     friend class __bit_iterator<__bitset, false>;
     friend class __bit_iterator<__bitset, true>;
-    friend class __bit_array<__bitset>;
+    friend struct __bit_array<__bitset>;
 
     __storage_type __first_;
 
diff --git a/include/vector b/include/vector
index 04a23ab7..07859c94 100644
--- a/include/vector
+++ b/include/vector
@@ -2318,7 +2318,7 @@ private:
     friend class __bit_const_reference<vector>;
     friend class __bit_iterator<vector, false>;
     friend class __bit_iterator<vector, true>;
-    friend class __bit_array<vector>;
+    friend struct __bit_array<vector>;
     friend struct _LIBCPP_VISIBLE hash<vector>;
 };