diff --git a/gst/compositor/blend.c b/gst/compositor/blend.c
index 074619371b..657732a3cf 100644
--- a/gst/compositor/blend.c
+++ b/gst/compositor/blend.c
@@ -873,6 +873,7 @@ RGB_FILL_COLOR (xrgb, 4, _memset_xrgb);
 MEMSET_XRGB (xbgr, 0, 16, 24);
 RGB_FILL_COLOR (xbgr, 4, _memset_xbgr);
 
+RGB_FILL_CHECKER_C (rgbx, 4, 0, 1, 2);
 MEMSET_XRGB (rgbx, 24, 16, 8);
 RGB_FILL_COLOR (rgbx, 4, _memset_rgbx);
 
@@ -1053,6 +1054,7 @@ FillCheckerFunction gst_compositor_fill_checker_y41b;
 FillCheckerFunction gst_compositor_fill_checker_rgb;
 /* BGR is equal to RGB */
 FillCheckerFunction gst_compositor_fill_checker_xrgb;
+FillCheckerFunction gst_compositor_fill_checker_rgbx;
 /* BGRx, xRGB, xBGR are equal to RGBx */
 FillCheckerFunction gst_compositor_fill_checker_yuy2;
 /* YVYU is equal to YUY2 */
@@ -1113,6 +1115,7 @@ gst_compositor_init_blend (void)
   gst_compositor_fill_checker_y41b = GST_DEBUG_FUNCPTR (fill_checker_y41b);
   gst_compositor_fill_checker_rgb = GST_DEBUG_FUNCPTR (fill_checker_rgb_c);
   gst_compositor_fill_checker_xrgb = GST_DEBUG_FUNCPTR (fill_checker_xrgb_c);
+  gst_compositor_fill_checker_rgbx = GST_DEBUG_FUNCPTR (fill_checker_rgbx_c);
   gst_compositor_fill_checker_yuy2 = GST_DEBUG_FUNCPTR (fill_checker_yuy2_c);
   gst_compositor_fill_checker_uyvy = GST_DEBUG_FUNCPTR (fill_checker_uyvy_c);
 
diff --git a/gst/compositor/blend.h b/gst/compositor/blend.h
index d7df05e69d..92ec21abcc 100644
--- a/gst/compositor/blend.h
+++ b/gst/compositor/blend.h
@@ -90,8 +90,8 @@ extern FillCheckerFunction gst_compositor_fill_checker_rgb;
 #define gst_compositor_fill_checker_bgr gst_compositor_fill_checker_rgb
 extern FillCheckerFunction gst_compositor_fill_checker_rgbx;
 #define gst_compositor_fill_checker_bgrx gst_compositor_fill_checker_rgbx
-#define gst_compositor_fill_checker_xrgb gst_compositor_fill_checker_rgbx
-#define gst_compositor_fill_checker_xbgr gst_compositor_fill_checker_rgbx
+extern FillCheckerFunction gst_compositor_fill_checker_xrgb;
+#define gst_compositor_fill_checker_xbgr gst_compositor_fill_checker_xrgb
 extern FillCheckerFunction gst_compositor_fill_checker_yuy2;
 #define gst_compositor_fill_checker_yvyu gst_compositor_fill_checker_yuy2;
 extern FillCheckerFunction gst_compositor_fill_checker_uyvy;