diff --git a/zathura.c b/zathura.c
index 49a78b0..2373d6c 100644
--- a/zathura.c
+++ b/zathura.c
@@ -870,7 +870,7 @@ document_save(zathura_t* zathura, const char* path, bool overwrite)
 static void
 remove_page_from_table(GtkWidget* page, gpointer permanent)
 {
-  if (permanent == false) {
+  if ((bool)permanent == false) {
     g_object_ref(G_OBJECT(page));
   }
 
@@ -949,7 +949,7 @@ document_close(zathura_t* zathura, bool keep_monitor)
   zathura->sync.render_thread = NULL;
 
   /* remove widgets */
-  gtk_container_foreach(GTK_CONTAINER(zathura->ui.page_widget), remove_page_from_table, (gpointer) 1);
+  gtk_container_foreach(GTK_CONTAINER(zathura->ui.page_widget), remove_page_from_table, (gpointer) true);
   for (unsigned int i = 0; i < zathura_document_get_number_of_pages(zathura->document); i++) {
     g_object_unref(zathura->pages[i]);
   }