@@ -, +, @@ 
---
 config.h.meson                          | 3 +++
 meson.build                             | 7 +++++++
 src/shell-polkit-authentication-agent.h | 2 ++
 3 files changed, 12 insertions(+)
--- a/config.h.meson	
+++ a/config.h.meson	
@@ -33,3 +33,6 @@ 
 
 /* Define if fdwalk is available in libc */
 #mesondefine HAVE_FDWALK
+
+/* Define if polkit defines autocleanup functions */
+#mesondefine HAVE_POLKIT_AUTOCLEANUP
--- a/meson.build	
+++ a/meson.build	
@@ -169,6 +169,13 @@ cdata.set('HAVE_FDWALK',
           cc.has_function('fdwalk')
 )
 
+polkit_has_autocleanup = cc.compiles(
+  '#define POLKIT_AGENT_I_KNOW_API_IS_SUBJECT_TO_CHANGE
+  #include <polkitagent/polkitagent.h>
+  void main(void) { g_autoptr(PolkitAgentListener) agent = NULL; }',
+  dependencies: polkit_dep)
+cdata.set('HAVE_POLKIT_AUTOCLEANUP', polkit_has_autocleanup)
+
 buildtype = get_option('buildtype')
 if buildtype != 'plain'
   all_warnings = [
--- a/src/shell-polkit-authentication-agent.h	
+++ a/src/shell-polkit-authentication-agent.h	
@@ -14,8 +14,10 @@ 
 
 G_BEGIN_DECLS
 
+#ifndef HAVE_POLKIT_AUTOCLEANUP
 /* Polkit doesn't have g_autoptr support, thus we have to manually set the autoptr function here */
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (PolkitAgentListener, g_object_unref)
+#endif
 
 #define SHELL_TYPE_POLKIT_AUTHENTICATION_AGENT (shell_polkit_authentication_agent_get_type())
 
--