diff --git a/CMakeLists.txt b/CMakeLists.txt
index 681ac89..40882c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,6 +54,14 @@
 project("Trusted Firmware M" VERSION ${TFM_VERSION} LANGUAGES C ASM)
 tfm_toolchain_reload_compiler()
 
+############################ Config Check ######################################
+
+include(${CMAKE_SOURCE_DIR}/config/check_config.cmake)
+
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/platform/ext/target/${TFM_PLATFORM}/check_config.cmake)
+    include(platform/ext/target/${TFM_PLATFORM}/check_config.cmake)
+endif()
+
 ################################################################################
 
 add_subdirectory(lib/ext)
diff --git a/config/set_config.cmake b/config/set_config.cmake
index 3a67162..5c9e183 100644
--- a/config/set_config.cmake
+++ b/config/set_config.cmake
@@ -44,8 +44,3 @@
 
 # Load defaults, setting options not already set
 include(config/config_default.cmake)
-
-
-############################ Sanity Check ######################################
-
-include(${CMAKE_SOURCE_DIR}/config/check_config.cmake)