diff --git a/ext/gl/gstglbasemixer.c b/ext/gl/gstglbasemixer.c
index 3e77e3394d..87cea2c4b2 100644
--- a/ext/gl/gstglbasemixer.c
+++ b/ext/gl/gstglbasemixer.c
@@ -270,7 +270,6 @@ gst_gl_base_mixer_class_init (GstGLBaseMixerClass * klass)
       GST_DEBUG_FUNCPTR (gst_gl_base_mixer_set_context);
   element_class->change_state = gst_gl_base_mixer_change_state;
 
-  agg_class->sinkpads_type = GST_TYPE_GL_BASE_MIXER_PAD;
   agg_class->sink_query = gst_gl_base_mixer_sink_query;
   agg_class->src_query = gst_gl_base_mixer_src_query;
   agg_class->src_activate = gst_gl_base_mixer_src_activate_mode;
diff --git a/ext/gl/gstglmixer.c b/ext/gl/gstglmixer.c
index 06b50134c5..856a433f9d 100644
--- a/ext/gl/gstglmixer.c
+++ b/ext/gl/gstglmixer.c
@@ -365,9 +365,9 @@ gst_gl_mixer_class_init (GstGLMixerClass * klass)
   gobject_class->set_property = gst_gl_mixer_set_property;
 
   gst_element_class_add_static_pad_template (element_class, &src_factory);
-  gst_element_class_add_static_pad_template (element_class, &sink_factory);
+  gst_element_class_add_static_pad_template_with_gtype (element_class,
+      &sink_factory, GST_TYPE_GL_MIXER_PAD);
 
-  agg_class->sinkpads_type = GST_TYPE_GL_MIXER_PAD;
   agg_class->sink_query = gst_gl_mixer_sink_query;
   agg_class->src_query = gst_gl_mixer_src_query;
   agg_class->stop = gst_gl_mixer_stop;
diff --git a/ext/gl/gstglstereomix.c b/ext/gl/gstglstereomix.c
index 9e42b23f67..d3fe0302f2 100644
--- a/ext/gl/gstglstereomix.c
+++ b/ext/gl/gstglstereomix.c
@@ -180,9 +180,9 @@ gst_gl_stereo_mix_class_init (GstGLStereoMixClass * klass)
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 
   gst_element_class_add_static_pad_template (element_class, &src_factory);
-  gst_element_class_add_static_pad_template (element_class, &sink_factory);
+  gst_element_class_add_static_pad_template_with_gtype (element_class,
+      &sink_factory, GST_TYPE_GL_STEREO_MIX_PAD);
 
-  agg_class->sinkpads_type = GST_TYPE_GL_STEREO_MIX_PAD;
   agg_class->stop = gst_gl_stereo_mix_stop;
   agg_class->start = gst_gl_stereo_mix_start;
   agg_class->src_query = gst_gl_stereo_mix_src_query;
diff --git a/ext/gl/gstglvideomixer.c b/ext/gl/gstglvideomixer.c
index 91e5ad2632..487bf2fe16 100644
--- a/ext/gl/gstglvideomixer.c
+++ b/ext/gl/gstglvideomixer.c
@@ -55,6 +55,14 @@
 #define GST_CAT_DEFAULT gst_gl_video_mixer_debug
 GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
 
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
+    GST_PAD_SINK,
+    GST_PAD_REQUEST,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
+        (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
+            "RGBA"))
+    );
+
 #define GST_TYPE_GL_VIDEO_MIXER_BACKGROUND (gst_gl_video_mixer_background_get_type())
 static GType
 gst_gl_video_mixer_background_get_type (void)
@@ -862,6 +870,9 @@ gst_gl_video_mixer_class_init (GstGLVideoMixerClass * klass)
       "Filter/Effect/Video/Compositor", "OpenGL video_mixer",
       "Matthew Waters <matthew@centricular.com>");
 
+  gst_element_class_add_static_pad_template_with_gtype (element_class,
+      &sink_factory, GST_TYPE_GL_VIDEO_MIXER_PAD);
+
   g_object_class_install_property (gobject_class, PROP_BACKGROUND,
       g_param_spec_enum ("background", "Background", "Background type",
           GST_TYPE_GL_VIDEO_MIXER_BACKGROUND,
@@ -875,7 +886,6 @@ gst_gl_video_mixer_class_init (GstGLVideoMixerClass * klass)
 
   vagg_class->update_caps = _update_caps;
 
-  agg_class->sinkpads_type = GST_TYPE_GL_VIDEO_MIXER_PAD;
   agg_class->fixate_src_caps = _fixate_caps;
   agg_class->propose_allocation = gst_gl_video_mixer_propose_allocation;