diff --git a/.gitignore b/.gitignore
index 0d65b30..35597e0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 build/
+cmake-build-*/
 
 .vscode/.*
 
diff --git a/options.cmake b/options.cmake
index d9b72f2..e630f4b 100644
--- a/options.cmake
+++ b/options.cmake
@@ -27,7 +27,7 @@ set(CONFIG_SERIAL_BUFSZ 256 CACHE STRING "Default serial buffer size in bytes")
 
 set(CONFIG_PRINTF_BUFSZ 64 CACHE STRING "Default buffer size for printf() and friends")
 
-option(CONFIG_CHECK_SYSCALL_SOURCE "Prohibit inline syscalls" OFF)
+option(CONFIG_CHECK_SYSCALL_SOURCE "Prohibit inline syscalls" ${DEBUG})
 
 # This file is part of Ardix.
 # Copyright (c) 2021 Felix Kopp <owo@fef.moe>.