3 files changed, 12 insertions, 12 deletions
diff --git a/src/login/logind-action.h b/src/login/logind-action.h
index df080d98ed..552713637d 100644
--- a/src/login/logind-action.h
+++ b/src/login/logind-action.h
@@ -46,8 +46,8 @@ int manager_handle_action(
                 bool ignore_inhibited,
                 bool is_edge);
 
-const char* handle_action_to_string(HandleAction h);
-HandleAction handle_action_from_string(const char *s);
+const char* handle_action_to_string(HandleAction h) _const_;
+HandleAction handle_action_from_string(const char *s) _pure_;
 
 int config_parse_handle_action(const char *unit, const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 
diff --git a/src/login/logind-session.h b/src/login/logind-session.h
index c8dd181e7b..a73df3a3bc 100644
--- a/src/login/logind-session.h
+++ b/src/login/logind-session.h
@@ -135,14 +135,14 @@ int session_send_changed(Session *s, const char *properties);
 int session_send_lock(Session *s, bool lock);
 int session_send_lock_all(Manager *m, bool lock);
 
-const char* session_state_to_string(SessionState t);
-SessionState session_state_from_string(const char *s);
+const char* session_state_to_string(SessionState t) _const_;
+SessionState session_state_from_string(const char *s) _pure_;
 
-const char* session_type_to_string(SessionType t);
-SessionType session_type_from_string(const char *s);
+const char* session_type_to_string(SessionType t) _const_;
+SessionType session_type_from_string(const char *s) _pure_;
 
-const char* session_class_to_string(SessionClass t);
-SessionClass session_class_from_string(const char *s);
+const char* session_class_to_string(SessionClass t) _const_;
+SessionClass session_class_from_string(const char *s) _pure_;
 
-const char *kill_who_to_string(KillWho k);
-KillWho kill_who_from_string(const char *s);
+const char *kill_who_to_string(KillWho k) _const_;
+KillWho kill_who_from_string(const char *s) _pure_;
diff --git a/src/login/logind-user.h b/src/login/logind-user.h
index a679d43a30..080354da74 100644
--- a/src/login/logind-user.h
+++ b/src/login/logind-user.h
@@ -80,5 +80,5 @@ extern const DBusObjectPathVTable bus_user_vtable;
 int user_send_signal(User *u, bool new_user);
 int user_send_changed(User *u, const char *properties);
 
-const char* user_state_to_string(UserState s);
-UserState user_state_from_string(const char *s);
+const char* user_state_to_string(UserState s) _const_;
+UserState user_state_from_string(const char *s) _pure_;