diff --git a/src/boards/pico_w.cmake b/src/boards/pico_w.cmake
index 15b901d..7aeaaee 100644
--- a/src/boards/pico_w.cmake
+++ b/src/boards/pico_w.cmake
@@ -1,2 +1,3 @@
-set(PICO_CYW43_SUPPORTED "1" CACHE INTERNAL "Try to add support for PICO_CYW43")
+set(PICO_CYW43_SUPPORTED "1")
+pico_register_common_scope_var(PICO_CYW43_SUPPORTED)
 include(${CMAKE_CURRENT_LIST_DIR}/generic_board.cmake)