diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 710b871..075ebf0 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -82,7 +82,7 @@
 .KATI_READONLY := PLATFORM_SDK_EXTENSION_VERSION
 
 # This is the sdk extension version that PLATFORM_SDK_VERSION ships with.
-PLATFORM_BASE_SDK_EXTENSION_VERSION := 3
+PLATFORM_BASE_SDK_EXTENSION_VERSION := $(PLATFORM_SDK_EXTENSION_VERSION)
 .KATI_READONLY := PLATFORM_BASE_SDK_EXTENSION_VERSION
 
 # This are all known codenames.