diff --git a/CMakeLists.txt b/CMakeLists.txt
index 742e76e..d0751f8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -193,6 +193,7 @@ if(CONFIG_ZMK_JAVELIN_STENO)
       JAVELIN_USE_EMBEDDED_STENO=1
       JAVELIN_USE_USER_DICTIONARY=1
       JAVELIN_PLATFORM_ZEPHYR=1
+      JAVELIN_BOARD_CONFIG=<stddef.h>
     )
 
     target_sources(app PRIVATE