diff --git a/buildcfg.txt b/buildcfg.txt
index e8b20a02..0ac50e50 100644
--- a/buildcfg.txt
+++ b/buildcfg.txt
@@ -2659,6 +2659,7 @@ CEIL3_6
 CEIL4_3
 CEIL5_1
 CEIL5_2
+CEIL5_3
 DEM1_3
 DEM1_5
 DEM1_6
diff --git a/flats/ceil5_3.png b/flats/ceil5_3.png
new file mode 100644
index 00000000..311d841e
Binary files /dev/null and b/flats/ceil5_3.png differ