diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 0774710ff2..f8c47fa3fc 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -915,6 +915,9 @@ Gtk_3_0_gir_CFLAGS = \
 		-UGTK_DISABLE_DEPRECATED \
 		-DGTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
 Gtk_3_0_gir_LIBS = $(gtktargetlib)
+if USE_X11
+Gtk_3_0_gir_LIBS += $(top_builddir)/gdk/x11/libgdk-x11.la
+endif
 Gtk_3_0_gir_FILES = $(introspection_files)
 INTROSPECTION_GIRS += Gtk-3.0.gir