diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 2c00c16..16e3fcf 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -40,10 +40,10 @@
   include $(INTERNAL_BUILD_ID_MAKEFILE)
 endif
 
-DEFAULT_PLATFORM_VERSION := TP1A
+DEFAULT_PLATFORM_VERSION := UP1A
 .KATI_READONLY := DEFAULT_PLATFORM_VERSION
 MIN_PLATFORM_VERSION := TP1A
-MAX_PLATFORM_VERSION := TP1A
+MAX_PLATFORM_VERSION := UP1A
 
 # The last stable version name of the platform that was released.  During
 # development, this stays at that previous version, while the codename indicates
@@ -54,6 +54,7 @@
 # These are the current development codenames, if the build is not a final
 # release build.  If this is a final release build, it is simply "REL".
 PLATFORM_VERSION_CODENAME.TP1A := Tiramisu
+PLATFORM_VERSION_CODENAME.UP1A := UpsideDownCake
 
 # This is the user-visible version.  In a final release build it should
 # be empty to use PLATFORM_VERSION as the user-visible version.  For
@@ -90,7 +91,7 @@
 Base Base11 Cupcake Donut Eclair Eclair01 EclairMr1 Froyo Gingerbread GingerbreadMr1 \
 Honeycomb HoneycombMr1 HoneycombMr2 IceCreamSandwich IceCreamSandwichMr1 \
 JellyBean JellyBeanMr1 JellyBeanMr2 Kitkat KitkatWatch Lollipop LollipopMr1 M N NMr1 O OMr1 P \
-Q R S Sv2 Tiramisu
+Q R S Sv2 Tiramisu UpsideDownCake
 
 # Convert from space separated list to comma separated
 PLATFORM_VERSION_KNOWN_CODENAMES := \