diff --git a/32blit-pico/CMakeLists.txt b/32blit-pico/CMakeLists.txt
index 7cc10705f..64938fddb 100644
--- a/32blit-pico/CMakeLists.txt
+++ b/32blit-pico/CMakeLists.txt
@@ -3,6 +3,7 @@ cmake_policy(SET CMP0079 NEW) # target_link_libraries() allows use with targets
 set(CMAKE_C_STANDARD 11)
 
 # Initialise the Pico SDK
+set(PICO_BOARD_HEADER_DIRS ${CMAKE_CURRENT_LIST_DIR}/board)
 include (pico_sdk_import.cmake)
 
 set(32BLIT_PICO 1 PARENT_SCOPE)
diff --git a/32blit-pico/sdk_import.cmake b/32blit-pico/sdk_import.cmake
index e7083cb06..7279e072b 100644
--- a/32blit-pico/sdk_import.cmake
+++ b/32blit-pico/sdk_import.cmake
@@ -1,3 +1,4 @@
 if(PICO_BOARD)
+    set(PICO_BOARD_HEADER_DIRS ${CMAKE_CURRENT_LIST_DIR}/board)
     include(${CMAKE_CURRENT_LIST_DIR}/pico_sdk_import.cmake)
 endif()