diff --git a/CMakeLists.txt b/CMakeLists.txt
index 57b9bb7..1bd5212 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,7 @@ set(TARGET_SOURCES
     "SDK/libraries/drivers/src/at32f403_xmc.c"
     "board/at32f403_board.c"
     "board/at32f403_clock.c"
+    "board/at32f403_int.c"
     "src/main.c"
 )