diff --git a/gtk3/main.c b/gtk3/main.c
index 4be2ff3..78e98fa 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -1338,6 +1338,33 @@ static void activate_open(GSimpleAction *action, GVariant *parameter, gpointer a
 	stop();
 
 	GtkFileChooserNative *native = gtk_file_chooser_native_new("Open File", GTK_WINDOW(gui_data.main_window), GTK_FILE_CHOOSER_ACTION_OPEN, "_Open", "_Cancel");
+
+	GtkFileFilter *filter = gtk_file_filter_new();
+	gtk_file_filter_add_pattern(filter, "*.gb");
+	gtk_file_filter_add_pattern(filter, "*.gbc");
+	gtk_file_filter_add_pattern(filter, "*.isx");
+	gtk_file_filter_add_mime_type(filter, "application/x-gameboy-rom");
+	gtk_file_filter_add_mime_type(filter, "application/x-gameboy-color-rom");
+	gtk_file_filter_set_name(filter, "All Supported Files (*.gb, *.gbc, *.isx)");
+	gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(native), filter);
+
+	filter = gtk_file_filter_new();
+	gtk_file_filter_add_pattern(filter, "*.gb");
+	gtk_file_filter_add_mime_type(filter, "application/x-gameboy-rom");
+	gtk_file_filter_set_name(filter, "Game Boy (*.gb)");
+	gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(native), filter);
+
+	filter = gtk_file_filter_new();
+	gtk_file_filter_add_pattern(filter, "*.gbc");
+	gtk_file_filter_add_mime_type(filter, "application/x-gameboy-color-rom");
+	gtk_file_filter_set_name(filter, "Game Boy Color (*.gbc)");
+	gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(native), filter);
+
+	filter = gtk_file_filter_new();
+	gtk_file_filter_add_pattern(filter, "*");
+	gtk_file_filter_set_name(filter, "All Files");
+	gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(native), filter);
+
 	gint res = gtk_native_dialog_run(GTK_NATIVE_DIALOG(native));
 
 	if (res == GTK_RESPONSE_ACCEPT) {