diff --git a/CMakeLists.txt b/CMakeLists.txt
index 972290a..687f639 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,6 +30,7 @@ option(BUILD_DRIVER "Build the porch(1) driver" ON)
 
 set(warnings "-Wall -Wextra -Werror")
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	add_compile_definitions(_FORTIFY_SOURCE=2)
 	add_compile_options(-fsanitize=address,undefined -fstrict-aliasing)
 	add_link_options(-fsanitize=address,undefined -fstrict-aliasing)
 endif()