diff --git a/libcxx/include/variant b/libcxx/include/variant
--- a/libcxx/include/variant
+++ b/libcxx/include/variant
@@ -1638,7 +1638,7 @@
 
 #  if _LIBCPP_STD_VER > 17
 
-template <class... _Types>
+template <class... _Types> requires (three_way_comparable<_Types> && ...)
 _LIBCPP_HIDE_FROM_ABI constexpr common_comparison_category_t<compare_three_way_result_t<_Types>...>
 operator<=>(const variant<_Types...>& __lhs, const variant<_Types...>& __rhs) {
   using __variant_detail::__visitation::__variant;
diff --git a/libcxx/test/std/utilities/variant/variant.relops/three_way.pass.cpp b/libcxx/test/std/utilities/variant/variant.relops/three_way.pass.cpp
--- a/libcxx/test/std/utilities/variant/variant.relops/three_way.pass.cpp
+++ b/libcxx/test/std/utilities/variant/variant.relops/three_way.pass.cpp
@@ -173,12 +173,8 @@
 static_assert( has_three_way_op<HasOnlySpaceship>);
 static_assert( has_three_way_op<std::variant<int, HasOnlySpaceship>>);
 
-// variants containing types with unavailable operator== still exist but will
-// generate a compilation error if their operator== is invoked, so the variant
-// type here participates when asked for operator== and operator<=> even though
-// it would actually fail.
 static_assert(!three_way_comparable<HasOnlySpaceship>);
-static_assert( three_way_comparable<std::variant<int, HasOnlySpaceship>>);
+static_assert(!three_way_comparable<std::variant<int, HasOnlySpaceship>>);
 
 static_assert( has_three_way_op<HasFullOrdering>);
 static_assert( has_three_way_op<std::variant<int, HasFullOrdering>>);