diff --git a/toolchains/i686-elf.cmake b/toolchains/i686-elf.cmake
index 4989b82..8e260bc 100644
--- a/toolchains/i686-elf.cmake
+++ b/toolchains/i686-elf.cmake
@@ -2,5 +2,7 @@ set(CMAKE_SYSTEM_NAME Generic)
 set(CMAKE_SYSTEM_PROCESSOR i686)
 
 set(CMAKE_C_COMPILER i686-elf-gcc)
-set(CMAKE_C_COMPILER_WORKS TRUE)
+set(CMAKE_C_FLAGS "-ffreestanding -fno-builtin" CACHE STRING "C flags for test compilation.")
+set(CMAKE_EXE_LINKER_FLAGS "-ffreestanding -nostdlib" CACHE STRING "Linker flags for test compilation.")
+set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES CMAKE_C_FLAGS)
 set(CMAKE_ASM_COMPILER i686-elf-as)