diff --git a/examples/host/cdc_msc_hid/CMakeLists.txt b/examples/host/cdc_msc_hid/CMakeLists.txt
index a9a4f08ad..ac57bf6dd 100644
--- a/examples/host/cdc_msc_hid/CMakeLists.txt
+++ b/examples/host/cdc_msc_hid/CMakeLists.txt
@@ -19,6 +19,7 @@ if(FAMILY STREQUAL "rp2040")
   # Example source
   target_sources(${PROJECT} PUBLIC
     ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/hid_app.c
     ${CMAKE_CURRENT_SOURCE_DIR}/src/msc_app.c
   )