diff --git a/tests/examples/gtk/Makefile.am b/tests/examples/gtk/Makefile.am
index 71441b453f..adf5e3178a 100644
--- a/tests/examples/gtk/Makefile.am
+++ b/tests/examples/gtk/Makefile.am
@@ -16,10 +16,12 @@ gtkglsink_CFLAGS = $(GTK3_CFLAGS) \
 	$(GST_PLUGINS_BAD_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_CFLAGS) \
-	$(GL_CFLAGS)
+	$(GL_CFLAGS) \
+	-DGST_USE_UNSTABLE_API
 gtkglsink_LDADD = $(GTK3_LIBS) \
 	$(GST_LIBS) \
-	$(GL_LIBS)
+	$(GL_LIBS) \
+	$(X11_LIBS)
 
 glliveshader_SOURCES = glliveshader.c
 glliveshader_CFLAGS = $(GTK3_CFLAGS) \
@@ -28,10 +30,12 @@ glliveshader_CFLAGS = $(GTK3_CFLAGS) \
 	$(GST_PLUGINS_BAD_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_CFLAGS) \
-	$(GL_CFLAGS)
+	$(GL_CFLAGS) \
+	-DGST_USE_UNSTABLE_API
 glliveshader_LDADD = $(GTK3_LIBS) \
 	$(GST_LIBS) \
 	$(GL_LIBS) \
-	$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la
+	$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la \
+	$(X11_LIBS)
 endif
 endif