diff --git a/lapiz/smclient/eggsmclient.c b/lapiz/smclient/eggsmclient.c
index 11564a20..ba1961ff 100644
--- a/lapiz/smclient/eggsmclient.c
+++ b/lapiz/smclient/eggsmclient.c
@@ -28,7 +28,7 @@
 static void egg_sm_client_debug_handler (const char *log_domain,
 					 GLogLevelFlags log_level,
 					 const char *message,
-					 gpointer user_data);
+					 gpointer user_data G_GNUC_UNUSED);
 
 enum {
   SAVE_STATE,
@@ -50,7 +50,7 @@ static EggSMClient *global_client;
 static EggSMClientMode global_client_mode = EGG_SM_CLIENT_MODE_NORMAL;
 
 static void
-egg_sm_client_init (EggSMClient *client)
+egg_sm_client_init (EggSMClient *client G_GNUC_UNUSED)
 {
   ;
 }
@@ -177,10 +177,10 @@ static char *sm_client_id = NULL;
 static char *sm_config_prefix = NULL;
 
 static gboolean
-sm_client_post_parse_func (GOptionContext  *context,
-			   GOptionGroup    *group,
-			   gpointer         data,
-			   GError         **error)
+sm_client_post_parse_func (GOptionContext  *context G_GNUC_UNUSED,
+			   GOptionGroup    *group G_GNUC_UNUSED,
+			   gpointer         data G_GNUC_UNUSED,
+			   GError         **error G_GNUC_UNUSED)
 {
   EggSMClient *client = egg_sm_client_get ();
 
@@ -557,7 +557,7 @@ static void
 egg_sm_client_debug_handler (const char *log_domain,
 			     GLogLevelFlags log_level,
 			     const char *message,
-			     gpointer user_data)
+			     gpointer user_data G_GNUC_UNUSED)
 {
   static int debug = -1;