diff --git a/CMakeLists.txt b/CMakeLists.txt
index 69d9cfe..13d01a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,8 +38,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
 add_subdirectory(openthread)
 
 target_compile_definitions(ot-config INTERFACE
-    OPENTHREAD_CONFIG_FILE="openthread-core-b91-config.h"
-    OPENTHREAD_PROJECT_CORE_CONFIG_FILE="openthread-core-b91-config.h"
+    OPENTHREAD_PLATFORM_CORE_CONFIG_FILE="openthread-core-b91-config.h"
     OPENTHREAD_CORE_CONFIG_PLATFORM_CHECK_FILE="openthread-core-b91-config-check.h"
 )