diff --git a/protocol/meson.build b/protocol/meson.build
index 5f34a7a..670a4af 100644
--- a/protocol/meson.build
+++ b/protocol/meson.build
@@ -5,7 +5,7 @@ wayland_scanner = find_program('wayland-scanner')
 wayland_client = dependency('wayland-client')
 wayland_protos = dependency('wayland-protocols', version: '>=1.17')
 
-wl_protocol_dir = wayland_protos.get_pkgconfig_variable('pkgdatadir')
+wl_protocol_dir = wayland_protos.get_variable('pkgdatadir')
 
 wayland_scanner_code = generator(
   wayland_scanner,
diff --git a/src/main.c b/src/main.c
index 2484a63..c95ecbf 100644
--- a/src/main.c
+++ b/src/main.c
@@ -8,6 +8,10 @@
 #include "glviewport.h"
 #include "headform.h"
 
+#if !GLIB_CHECK_VERSION(2, 74, 0)
+#define G_APPLICATION_DEFAULT_FLAGS G_APPLICATION_FLAGS_NONE
+#endif
+
 __attribute__((noreturn)) void wd_fatal_error(int status, const char *message) {
   GtkWindow *parent = gtk_application_get_active_window(GTK_APPLICATION(g_application_get_default()));
   GtkWidget *dialog = gtk_message_dialog_new(parent, GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR, GTK_BUTTONS_OK, "%s", message);
@@ -1084,7 +1088,7 @@ static void activate(GtkApplication* app, gpointer user_data) {
 
 int main(int argc, char *argv[]) {
   g_setenv("GDK_GL", "gles", FALSE);
-  GtkApplication *app = gtk_application_new(WDISPLAYS_APP_ID, G_APPLICATION_FLAGS_NONE);
+  GtkApplication *app = gtk_application_new(WDISPLAYS_APP_ID, G_APPLICATION_DEFAULT_FLAGS);
   g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
   int status = g_application_run(G_APPLICATION(app), argc, argv);
   g_object_unref(app);
diff --git a/src/meson.build b/src/meson.build
index 08830e9..223f967 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -6,7 +6,7 @@ m_dep = cc.find_library('m', required : false)
 rt_dep = cc.find_library('rt', required : false)
 gdk = dependency('gdk-3.0', version: '>= 3.24')
 gtk = dependency('gtk+-3.0', version: '>= 3.24')
-assert(gdk.get_pkgconfig_variable('targets').split().contains('wayland'), 'Wayland GDK backend not present')
+assert(gdk.get_variable('targets').split().contains('wayland'), 'Wayland GDK backend not present')
 epoxy = dependency('epoxy')
 
 configure_file(input: 'config.h.in', output: 'config.h', configuration: conf)
diff --git a/src/outputs.c b/src/outputs.c
index 024a686..b5ed898 100644
--- a/src/outputs.c
+++ b/src/outputs.c
@@ -93,10 +93,8 @@ void wd_apply_state(struct wd_state *state, struct wl_list *new_outputs,
 
   zwlr_output_configuration_v1_add_listener(config, &config_listener, pending);
 
-  ssize_t i = -1;
   struct wd_head_config *output;
   wl_list_for_each(output, new_outputs, link) {
-    i++;
     struct wd_head *head = output->head;
 
     if (!output->enabled && output->enabled != head->enabled) {